Malicious PDF — malware analysis report

Static analysis result for SHA-256 338186f8a09af2e0…

MALICIOUS

PDF

75.1 KB Created: 2021-05-13 17:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 87dc77e77fa22143370529da1f9064eb SHA-1: 5a94c8111cece846bbe0307ce709d3d63131dfd3 SHA-256: 338186f8a09af2e0303449e4028baed3fd9b521b2b7ee05bd9f30857f09ff714
146 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 0.9990

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.
  • 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://pelibifir.ru/strik?utm_term=wall+street+journal+print+subscription+canada PDF link annotation
    • http://pusuwanoxanopo.22web.org/66935544439.pdfIn PDF document text
    • https://dejifadagugo.weebly.com/uploads/1/3/4/6/134649040/wureja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_60260429593f8.pdfIn PDF document text
    • https://wilubowedawiwo.weebly.com/uploads/1/3/4/5/134528918/7755519.pdfIn PDF document text
    • http://judifino.iblogger.org/begifezitukujareru.pdfIn PDF document text
    • https://pirizujimo.weebly.com/uploads/1/3/4/4/134454944/4353010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474223/normal_5fc8883c8f315.pdfIn PDF document text
    • http://ludunulanara.iblogger.org/forgotten_anne_trophy_guide.pdfIn PDF document text
    • http://toselarasomax.iblogger.org/almost_is_never_enough_piano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459463/normal_6062e9fb736c0.pdfIn PDF document text
    • http://pumeputokamodo.22web.org/31074292948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/akmu_dinosaur_piano_sheet.pdfIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_5b8e9685892c4eddae14ebec273ac3e3.pdf?index=trueIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_4972397d83c244abacf227c119ff9e0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/how_to_reset_maintenance_light_on_2012_camry_se.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/56664068863.pdfIn PDF document text
    • http://wipezusefoxilu.rf.gd/38066420154.pdfIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_97715b7566f949c79806c2714097cdc9.pdf?index=trueIn PDF document text
    • http://lawemupej.rf.gd/slave_trade_in_zanzibar.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/molomafavinu.pdfIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_cd5373c88860458392cb074f58068146.pdf?index=trueIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_65478f789ca340d69e469155f012cfca.pdf?index=trueIn PDF document text
    • http://bexilonedatisud.epizy.com/66077775846.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/jagizirirojutosapiw.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE649 5296 bytes
SHA-256: 2eacd4a6b6e184cf8f18a8229f1391e6a157f7864a97119a43fae35c2c0b56ce
font_01_sfnt_off0000f860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF860 11268 bytes
SHA-256: 8c099cf02294e2dc96ba4b4fe2cffc38d1c81a00e30daf53e055632cf6634f9a