Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a14750d6f6aec4d…

MALICIOUS

PDF

84.6 KB Created: 2021-03-28 20:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f1cbf95c13f53f30f989b850a1b532c3 SHA-1: 81bd6ed9860256652d3f19fe8b397db6b24f3036 SHA-256: 4a14750d6f6aec4d7da7feff68d3e77841e9d7cc2f6d52d6452328e349587696
156 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. 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 0.9998

Heuristics 5

  • 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.
  • 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://zajinet.ru/strik?utm_term=2004+honda+odyssey+intermittent+starting+problem PDF link annotation
    • https://kibanelamuvudu.weebly.com/uploads/1/3/0/9/130969844/vobupaxotelafenoluma.pdfIn PDF document text
    • https://gorenusedom.weebly.com/uploads/1/3/5/3/135326887/luwizopitezir-gewevime.pdfIn PDF document text
    • http://givikoninebana.22web.org/zogega.pdfIn PDF document text
    • http://xazigewit.iblogger.org/uncaught_typeerror._autotablehtmltojson_is_not_a_function.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/xubifupi/acute_gout_flare_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/mefik.pdfIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_d1d406e6ff7442f9b2eda75e1ac032c2.pdf?index=trueIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_ce6bda35410a4851854ed01059db2f7d.pdf?index=trueIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_5065c8dd0936488589a517deac21020b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/kitogejuxodade.pdfIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_9d4c3ab33d214d068e83628678e2802d.pdf?index=trueIn PDF document text
    • https://ede36962-9452-4451-b182-fa4236ba9bc6.filesusr.com/ugd/83b1b3_dfa4e8c216b84db1b349b41417737c87.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sitozi/midsummer_nights_dream_summary_act_4.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/giverotukoxu.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_29f85b70346244ac96079f83e1a6c061.pdf?index=trueIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_c7f7ca9616f042489fbe2ab86ac17b36.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_off0000fc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 5668 bytes
SHA-256: d33744d9eb04d97c48dea9799ed89d3dc24fb3ceda786352713de4fda42f159c
font_01_sfnt_off00010f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F80 11012 bytes
SHA-256: 016347bd459726932d0c22d409f06959c3ab74e132fcfc86fa95f2b873ab78a4
font_02_sfnt_off00013543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13543 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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