Malicious PDF — malware analysis report

Static analysis result for SHA-256 96df7f02b134258a…

MALICIOUS

PDF

76.6 KB Created: 2021-09-01 06:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 19c75c89968c8fd45f5f45c8bfc064b8 SHA-1: 3221681f0b071d85b4e916277521c6d71e043ccb SHA-256: 96df7f02b134258ab230e294e490ff396fd60c63bdc19c13013ddb393a80a3ad
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on potentially untrusted domains, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/votopilesutamememunewuxup.pdf In PDF document text
    • http://dajuicebarus.com/uploads/files/niwegajolanifogavo.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/58177473750.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/tepofulibawere.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b7576d7c6---wiselofajumiz.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/numifogididodepu.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/48670358826.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/torigenumozemut.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfc0381a11---suwovufa.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/k8hp44hl9uh44q03tn4ivteak2/16861027753.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ea78cd2e5d92fc7c151d944a53b74d6f/sofogodosijaxukikamu.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/8741992874.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/luvidanegosepeneku.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/36435899855.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/xetemefogazopawobaxo.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/misizubujura.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/78995486009.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/2tdl427ttc1c3at8nsggu0rnd2/redaxujufon.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/dinukunadegafopetuj.pdfIn PDF document text
    • http://bucketdiaries.com/uploads/files/88795044326.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/b6e78aadcbb69690e037188ce7a0c107/17888866287.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/92321486208.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/j8j4gugv5eajvdd63fv9u09u3f/544278837.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/guvusazixus.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b74d7001c59---68422114974.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074b260c3f2b---3334384200.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=hakim+meaning+in+englishPDF 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_off0000c21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21D 18856 bytes
SHA-256: bd40ff0fa927af2630c0445377f9a257a72df494efdd24f94e5de90db9fe68f5
font_01_sfnt_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF8 10320 bytes
SHA-256: 1275a758f71c9eadcf5bdec55ee5b68273b3e47983ab7645b97a794813cd9814

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