Malicious PDF — malware analysis report

Static analysis result for SHA-256 01608a75b30188fd…

MALICIOUS

PDF

84.4 KB Created: 2021-09-03 00:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 33699fdbd57c986ef16e67699aa616e9 SHA-1: 652270fb64d6425d22859a3ad410c0d2b4f7b34b SHA-256: 01608a75b30188fde482a1eb064b4fb19a69f90509866c6094dcc42f7499f6e6
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The PDF itself appears to be a lure, likely intended to trick users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/bffdbe9f97da3dd95fe06511af4516b3/vobelufob.pdf In PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/37127432171.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606c7604a6cdb---18164000722.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e5e54a71a---kuxofufiselu.pdfIn PDF document text
    • https://movingalpsfoundation.ch/userfiles/file/18490029138.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/sosekilebikiwixes.pdfIn PDF document text
    • http://saokienviet.com/uploads/image/files/rorupoleworadalavel.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084361a8c6a8---52217885594.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/zevoxajinil.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/7693041750.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/16abe37458d936b65895276ab4aff3e5/korovufupazejabuvomabo.pdfIn PDF document text
    • https://shipnhanh247.vn/asset/files/milikijomisuba.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/7af2b7bcaa952aeb84d5910a8b95c0dc/sevijine.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd570127db---98441509565.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/6435701563.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/tarugegegimokax.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/87489929980.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872aa4bcd97---botenuxakiranavilalivo.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/8vlu48b5nlr83oeppq5esh75b1/75253322179.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/t5o401bhvhcvtpufgh175qs061/gadamuxoxugepola.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/2jt96u90qeit8ugo4rv89heeas/zirirurufo.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/5808794254.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=jones+economic+growth+pdfPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE312 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB29 10936 bytes
SHA-256: 17c1467cd46eb674a1e8813f7f4abf166ed65d0a454b04445567bf6f542bf956
font_02_sfnt_off0001142c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142C 18172 bytes
SHA-256: 37e87c6d0bf199528506b12c31aa6142289d748a5a687c95337682216877529a

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