Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f8cc696137856f…

MALICIOUS

PDF

71.1 KB Created: 2021-02-25 05:54:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: cc146577b6808d03a510ec8279d5311b SHA-1: ce2beab3c95c46b3a44abf3d0399db4693cb9539 SHA-256: a9f8cc696137856fdcccd1952fb80638ead059e79516e162817799effaa217c4
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://druttle.ru/award?keyword=how+to+multiplying+fractions+by+whole+numbers PDF link annotation
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/af640c5e143b1a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451544/normal_5ff30ccf2112b.pdfIn PDF document text
    • https://nixodogal.weebly.com/uploads/1/3/0/7/130739919/puwiza_fewekulimot_vudosinumulomon_mijagepi.pdfIn PDF document text
    • https://sivitudogadix.weebly.com/uploads/1/3/4/1/134108631/352f617a2.pdfIn PDF document text
    • https://luxoxika.weebly.com/uploads/1/3/4/8/134899107/2778164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_5fd667a4de89e.pdfIn PDF document text
    • https://funefazadoma.weebly.com/uploads/1/3/4/6/134648765/7187835.pdfIn PDF document text
    • https://bovabesizepin.weebly.com/uploads/1/3/1/3/131383515/d22ab73baabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456376/normal_60265f844f07e.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/gamirotixuworuwezowa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402740/normal_5fec20b10ced8.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/seruxebufadozawade.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/wujanozo/98878465986.pdfIn PDF document text
    • http://gibexuge.rf.gd/2008_cadillac_escalade_repair_manual.pdfIn PDF document text
    • http://nadiripu.epizy.com/30600336589.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/severance_package_negotiation_letter_template.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_off0000d6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BB 5724 bytes
SHA-256: 9e0fd8120498bd4415e5e355c0f4d9c6b7c7b848a301f560b632c464e53222f3
font_01_sfnt_off0000ea2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2E 10812 bytes
SHA-256: 5a8d56c0cf322408d2f1e4f2a083ed91d3093703fa6f93c5a5f758103ae4410b

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