Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eed0b9edb67de62…

MALICIOUS

PDF

94.0 KB Created: 2021-07-03 10:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a102e358415eca387df5fd425f767821 SHA-1: e9873871cef2f1aa8ca9a326770cb5eea9ec3b8e SHA-256: 2eed0b9edb67de622a27b7849465c048db32946367a71a7b22d0792f3b53c007
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing and redirection lure. It contains numerous links to compromised WordPress upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content or download a second-stage payload. The presence of invoice and payment-related language further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crysiq.ru/uplcv?utm_term=modular+arithmetic+questions+and+answers+pdf PDF link annotation
    • http://abwferrellpkwy.com/uploads/files/raxemoguda.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fe5a3edc1---gutofimuririrarubolali.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097db758de7e---nejilebovave.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/xusogexugefulitarotixes.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210625103433_uyw5bv.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/7da9407397b310efc8726eecbc7b753c/xifuvezekosexazije.pdfIn PDF document text
    • https://zenkenmoshi.info/images/files/file/24385067538.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/f51dc8e127677d94ccb4cd02fe646664/binerulepibeziduwelexo.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/tijimoleneruw.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/19256934323.pdfIn PDF document text
    • https://mmszke.hu/files/file/satetabivetamudifebidezu.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608f08edefab8---kikinorogur.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/qo901g5jpda35pstlm313i2t80/31968273487.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/diduvorofos.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/gujisalenanugoxika.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/91966608015.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/27579254296.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5adb17bb7---47100252822.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ap7rm60fefert86qdu7bo4e682/25294885328.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/85308868050.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/milesalufirefiwuz.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a24e43d7dea---59032626617.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/mno7a67vcsv1t5puii5ej03jk7/31652685911.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e75bb1038---mofesowaruginiwaxok.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a638d55eab0---kijejotavefivo.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/86199661973.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/3a8b4286851dae15aa9364a98d219844/fesotafafowojaruvoxite.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001097e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097E 18084 bytes
SHA-256: e9c31e0f1b807470c5dfab0061c5e4cfa70a89e8a5cd00bc14c3541ed0cbaa0a
font_02_sfnt_off000138a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A7 11208 bytes
SHA-256: 481f89b6293e4e2655228aa507df8d2aa432c2ed10a5af25f866834eb3fbd667
font_03_sfnt_off00015282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15282 16128 bytes
SHA-256: bfffaa37a5602b6eff5246b20cbad2384b754602d7d4442f8ad6d6889a1b717b

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