Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0c04ff9d95d79c…

MALICIOUS

PDF

88.8 KB Created: 2021-05-06 17:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7578dce2a910c4f3865de5ce1c256781 SHA-1: 12418aed2021bb5e1f51faf42633bc264845ce44 SHA-256: 7b0c04ff9d95d79c228df9a57afb8e96fe3898a7746744e91d555686bc46e33a
206 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 a callback-phone (TOAD) 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 0.9989

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/strik?utm_term=ask+the+dust+john+fante PDF link annotation
    • https://cdn.sqhk.co/libobivole/hhhg3jb/life_simulator_2_mod_apk_protopia_games.pdfIn PDF document text
    • http://xevedudox.sportsontheweb.net/pegoxelufeladi.pdfIn PDF document text
    • http://lixusopo.mywebcommunity.org/sazotebimer.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/qXjbrgd/31112329964.pdfIn PDF document text
    • https://lufuneliza.weebly.com/uploads/1/3/2/6/132682735/5394ad5f5ab3.pdfIn PDF document text
    • https://sisexalixigana.weebly.com/uploads/1/3/5/3/135323773/weseredososi.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://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_2329e8afa46a4ad0aee9a1670b14c941.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_2a420d631188489b950de735a9ab9839.pdf?index=trueIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_09fc2e6c81544b06ad74988b06e9af4b.pdf?index=trueIn PDF document text
    • http://putunoxixowelo.atwebpages.com/taditagitititibefag.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_4e930c2436524fd895cbb5885c59aa9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/biometric_security_system_project.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/contrato_de_arrendamiento_local_comercial_sencillo_word.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/plato_five_dialogues_euthyphro_apology_crito_meno_phaedo.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/18276507005.pdfIn PDF document text
    • http://nodikaduf.onlinewebshop.net/zepezetadufalezafutizasir.pdfIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_4813295b04bd41479f63ec08ca6f618e.pdf?index=trueIn PDF document text
    • https://fc59733d-949e-4df9-817b-fea2515c5cc7.filesusr.com/ugd/689329_20a6a6cba4164e0ba2e93ecbc6bbf2bc.pdf?index=trueIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_bddc0cc1f43c48b1a83279f2b9904945.pdf?index=trueIn PDF document text
    • http://dexizijisub.atwebpages.com/speak_softly_love_noten.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_71f672b83a824cdf86e1e125800e4aee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/10582891103.pdfIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_90dd97cf5dc843a594359038592cfebe.pdf?index=trueIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_9af8a6c9c80d4997bb54eee33d651f17.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E01 4828 bytes
SHA-256: 7bd0c42219e686b6010dad149bac30ffbc439dfebfaf553c057c4f37b835c7e6
font_01_sfnt_off00011e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6C 12528 bytes
SHA-256: 03a7545640fa0bdc9ad7b810de6669c8ef605a8e83f3ac00ad60c877c1e86ce5
font_02_sfnt_off00014774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14774 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361