Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6e30f9ac74b4d5…

MALICIOUS

PDF

86.4 KB Created: 2021-03-15 13:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5143f1d6432779373f376a813d16d702 SHA-1: 194713991064d6ee58067216617ae5d6c93d8c0f SHA-256: 3a6e30f9ac74b4d5b282e377a0fe7c78f9c765c6a1dc092ccb60e65e2b127273
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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://seumenha.ru/wix?keyword=vans+return+policy+without+receipt PDF link annotation
    • http://giwosoto.sportsontheweb.net/zexowafumurezizimanise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425909/normal_601a08705771f.pdfIn PDF document text
    • http://wobixoka.66ghz.com/amazing_grace_chains_are_gone_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490367/normal_600b63db1a047.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463266/normal_5fef5b6dbb2db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390328/normal_5ff97e66d7407.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476001/normal_5fcede87d9f8d.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/icDgieZ/92548175384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_602b067414525.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/yhekSih/45910613578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484814/normal_6002d33f239d6.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/bibjgx7/hago_lite_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_a07f826e102e421a9ecf34903336cae5.pdf?index=trueIn PDF document text
    • http://bupalim.atwebpages.com/49933519493.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/pelitapegojubovuv.pdfIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_2d14bf596287456ca434cb6b5a4b76c4.pdf?index=trueIn PDF document text
    • http://zavinawotomuvef.epizy.com/moving_powerpoint_templates_free.pdfIn PDF document text
    • http://bejanifezilo.atwebpages.com/academic_vocabulary_in_use_key.pdfIn PDF document text
    • https://4b002d3c-a55f-42ce-816c-238f848e88a9.filesusr.com/ugd/3398cc_53c2eb924ad64aa9994d3bd587ac76cd.pdf?index=trueIn PDF document text
    • http://jamoxesadesoxa.rf.gd/business_communication_today.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_ccd341eda2004da4bb4260e83f35bf66.pdf?index=trueIn PDF document text
    • http://rizivubonulej.atwebpages.com/who_is_carl_rogers_humanistic_psychology.pdfIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_ebd5c8a01f534f2fa59ed68f38b551d5.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC5 5632 bytes
SHA-256: 1b5a231edd3dbf29d577ad38986f01746bc66b1f979f8acd69ee540712877ff5
font_01_sfnt_off00010296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10296 5064 bytes
SHA-256: 0e8c0fd6edb3baf424d044c90c64e34a5f2428bcb5401d96470bad8fe54207b5
font_02_sfnt_off000113db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DB 12784 bytes
SHA-256: 99ae3f2f8a9bb52278fdabbdbca0958047193f8b81f9c4f32918cfc0d7023fc3
font_03_sfnt_off00013d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176