Malicious PDF — malware analysis report

Static analysis result for SHA-256 094ba2b7b02811b6…

MALICIOUS

PDF

71.9 KB Created: 2021-09-06 04:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6b006ffed81f25e7399d19a33f39994b SHA-1: 471aeac73606e80ff3efc9655b2ce6245a363e8c SHA-256: 094ba2b7b02811b67776c8c0dc646e8adf8b79507ffe9dd05319f27bf27ef1b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and a link farm heuristic indicates the document is designed to redirect users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://lionsmarsala.it/userfiles/files/37465777160.pdf In PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4591fc59b82e7d22e259e223dbab5c21/65623972962.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/38500925732.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/lipogoputad.pdfIn PDF document text
    • https://papiratisk.cz/soubory/gimemisufekivulegukezekaf.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/48162428109.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a72df6bb0d---bapuzo.pdfIn PDF document text
    • https://kund-in.com/userfiles/file/ravefor.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1313af44f---madajuk.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/zuxeziwenus.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/5e9b0438dec2b358d47654ee0851f0cf/65716645208.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/2473602320.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/kefavegati.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/rizifofejuburule.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/39925235046.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/perixodurozuje.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/25567109795.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/a209f7456aadde8bc09d2f48080be383/78635637576.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/1b01b742a2b4f0a37b3abd94ad180cd3/femazatiwuwelogesafe.pdfIn PDF document text
    • http://bulmarconsult.com/files/tipijuwubosopimeriger.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/pegedubupudokeko.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/551f04a502996f8945a7b34ca4ff8d3c/15751502426.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611118bea6ca7---sipejajuzaxolimelinaraj.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210626_135724.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=career+paths+medical+pdf+downloadPDF 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_off0000b80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB80B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01D 15900 bytes
SHA-256: 16ff893f42bd863f3df6126887a81efcc3c8a80ff446b60665c46e82017379a2
font_02_sfnt_off0000f86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86A 11000 bytes
SHA-256: e02d142ec5bedf7e9662cde50b6c158aacc115fd202b1b9c42d5329fb207624e

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