Malicious PDF — malware analysis report

Static analysis result for SHA-256 9237bff346ace99e…

MALICIOUS

PDF

77.6 KB Created: 2021-04-03 04:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f75013a74e8048a3bdba5274a50f1782 SHA-1: 5484ad07e490abad94517da1a830756ee82980dc SHA-256: 9237bff346ace99e7b6869b82568da3fe53ba0d170420e9a3c71fe07e9aebff2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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://gimoguvi.ru/strik?utm_term=private+practice+cast+season+5+episode+6 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474192/normal_603c636ad08b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496165/normal_60089dcdcbbc9.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/b4jj5LY/a_privacy-_aware_v-_model_for_software_development.pdfIn PDF document text
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/lopotosenulokezeri.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/hjifhf9/stickers_for_laptops_amazon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418166/normal_5fc6f1705f6bb.pdfIn PDF document text
    • https://cdn.sqhk.co/menigopas/igyjfgj/57174166273.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/ja3hics/bass_pro_shops_pyramid_meme.pdfIn PDF document text
    • https://lupoleleki.weebly.com/uploads/1/3/4/5/134516255/7554d4863a54d.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/u2jiNhf/daily_forklift_inspection_checklist_excel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445107/normal_600bd9e6b4737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446765/normal_604cd5aa5559a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489409/normal_603fe97373402.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/gEicDgd/81894091686.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/8jjcchc/93109017870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498971/normal_605f13e4d4455.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/56Chjel/sony_rewards_platinum_trophies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408589/normal_5ffa79d7027e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485696/normal_6023a81476379.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/tulosa/49129488177.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/summary_of_the_book_the_courage_of_sarah_noble.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/dividing_mixed_fractions_questions_and_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2F 5372 bytes
SHA-256: 12bcb551394ee1434094ca549130d1c767f03f107db6ca1b7d413e3f871990b5
font_01_sfnt_off0001018f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 10944 bytes
SHA-256: 96280f41e231e7da3e893940c86e2e59074fd97ba4e3e5d79d9bb4ba86b7938c

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