Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a59796a861da06f…

MALICIOUS

PDF

78.0 KB Created: 2021-04-04 21:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5cc2af6779645a6f5531e46022cb86fa SHA-1: 924d7f212c9ab74e324597a9ebb05fd692f5e911 SHA-256: 2a59796a861da06ff79f58a1f5146147843db8ba6b3e98acc2428bfd7bab7404
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farm attacks to boost search engine rankings or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The embedded URLs, such as 'https://pelibifir.ru/aws?utm_term=how+to+draw+cute+eyes+easy+step+by+step', suggest a lure to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/aws?utm_term=how+to+draw+cute+eyes+easy+step+by+step PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393044/normal_603ebeaaefa84.pdfIn PDF document text
    • http://kuwibixavuxo.iblogger.org/set_workbook_sheet_vba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464852/normal_6054d0dadaaed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_603c4fba574fa.pdfIn PDF document text
    • http://kagivumuro.iblogger.org/tech_newsletter_template_free.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/luworizesupox/shark_lift_away_deluxe_accessories.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_27b90d7ed792469d8dc450b52c15ea6d.pdf?index=trueIn PDF document text
    • https://37459de8-d961-4a2a-897a-801dad55dcfc.filesusr.com/ugd/1395e2_fdc9f314e4274827a78544d2842d236e.pdf?index=trueIn PDF document text
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_0e0f2d836c5a430383793fc24e1b8f0e.pdf?index=trueIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_138f345985824376aee5e8ee05295a17.pdf?index=trueIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_14c70d0be8b84a0aaf3001ab2aab3bb5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/2010_aha_guidelines_post-_cardiac_arrest_care.pdfIn PDF document text
    • http://likalesiwala.epizy.com/gofojaxipupufugiwovakogu.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/how_to_repair_a_fellowes_shredder.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/26858471359.pdfIn PDF document text
    • http://tadezaxe.rf.gd/lawoxojezubabesirekejuni.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/90486497915.pdfIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_6cebd8d6da44437a9a9b6bff49a26717.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/watajive/togegamokunopitin.pdfIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_7aa60a30bdd14677b78108aaf284cb66.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zetituri/xujugukaz.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/milady_chapter_14_review_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CD 5060 bytes
SHA-256: 2b1a22d5f416d746a210bf3356060e405ce66db49c710527bc05cfd9a6c1ec3a
font_01_sfnt_off0000fa1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1C 10032 bytes
SHA-256: 3dc35bb1adbcdae981045b7552bd6764fcc500bacf184df922bd36175854ece7
font_02_sfnt_off00011c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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