Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b14ea155e81347…

MALICIOUS

PDF

85.0 KB Created: 2021-03-20 23:06:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 462eb7bd64129b4dc028b0e56b2b0d22 SHA-1: db9a4d03078ce1973435e2802951861f069aef54 SHA-256: 80b14ea155e813476ceb5ef7e465f3b60797fda040be3987799e0397b71efa68
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The primary lure appears to be related to 'the balanced scorecard kaplan pdf', directing users to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/award?keyword=the+balanced+scorecard+kaplan+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368492/normal_6009a3965beb0.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/RibIgdQ/25962045363.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/bEfibha/scrap_copper_prices_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486350/normal_6001c5f6f3cf1.pdfIn PDF document text
    • https://kobirozo.weebly.com/uploads/1/3/4/8/134846370/zexovowa_fimigewi_fovuz_vijuse.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393220/normal_5ff65a8236f8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_60267c5abe947.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/gcjfhhR/ninja_run_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403689/normal_604bc196f3193.pdfIn PDF document text
    • https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/680ce69f2e7e2b8.pdfIn PDF document text
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/dawizuwaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_601f8e040079f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473415/normal_6052a2bd16f2e.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://s3.amazonaws.com/retisovojor/synonyms_worksheets_5th_grade.pdfIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_671b979d933e4ea88a42459b103cee86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/12745626873.pdfIn PDF document text
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_b999bc96ed534c23a0b0ed744c3f12c0.pdf?index=trueIn PDF document text
    • https://c768b399-4e28-4e9b-9352-a6bc169704b4.filesusr.com/ugd/debdc1_e0b498d6550c4492a3933bce0e9de724.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/jlpt_n4_practice_test_with_answers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D6 8040 bytes
SHA-256: 523b0321a9f68006d0803bd4298f54d26958d33dbb40744477d57fd46c600daf
font_01_sfnt_off000101d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 5056 bytes
SHA-256: 8f9ad261c0a338ac9c7511ec8435e06bcb7580bf646e6e41deabd64abe339b1f
font_02_sfnt_off000112e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E0 11024 bytes
SHA-256: 00cb992e9c4df1b9b689ae15e3ab6cf813107ed3be1199a6635a0317bf64e912
font_03_sfnt_off00013854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13854 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361