Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1139273013d35a4…

MALICIOUS

PDF

80.4 KB Created: 2021-04-05 01:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 86e5dc90b54c59e98bc91d5a5b1fe991 SHA-1: 81c1954f3c650bfc9302d0a21a1010303f897f92 SHA-256: c1139273013d35a474ec22448e000f0d91c65b33f33d01f65fb02c9cb01ef1e5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://fokemale.ru/strik?utm_term=snapper+zero+turn+lawn+mowers+prices PDF link annotation
    • http://vir-tus.com/nojokebipevuseln6o.pdfIn PDF document text
    • http://powerhdniy.space/tufututezupolond39hq.pdfIn PDF document text
    • http://shoop-fr.ru/6185334222ctyj9.pdfIn PDF document text
    • http://goromeo.club/homelite_weed_trimmer_gas_tankcsgku.pdfIn PDF document text
    • http://cardio-natural.info/694887143732aqoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383912/normal_5fec264660b73.pdfIn PDF document text
    • https://wumibopoz.weebly.com/uploads/1/3/4/5/134511789/6813475.pdfIn PDF document text
    • http://lastmarkt.ru/hp_image_enhancement_for_system_logon1iik8.pdfIn PDF document text
    • http://beremoter.online/50149640942iphrc.pdfIn PDF document text
    • https://kibodoru.weebly.com/uploads/1/3/2/6/132695707/b31bd4660533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458839/normal_60472ae917b1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484356/normal_6005b62315736.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://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_40ab240291cf4474bf19b252c38092b5.pdf?index=trueIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_633ad608686e4e87a40cce647ce6fe1b.pdf?index=trueIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_caa5e59bda67431e9dcee9fccf85957e.pdf?index=trueIn PDF document text
    • https://2e4b0ed6-c237-476e-b23b-7c95f147629f.filesusr.com/ugd/30e930_18005e145b94477784c6b4720191b2d4.pdf?index=trueIn PDF document text
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_70e50d438e944e42881532a639035018.pdf?index=trueIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_d71d0e978fd3463eba89dcfca0e1b1cb.pdf?index=trueIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_ab85f68c2ba1481e8532ff234bae1d96.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_off0000ee39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE39 5208 bytes
SHA-256: 231f01ac751bd04083d70d08f4bbdcfc2d84031341b6741f4aa689bd9c41b7a5
font_01_sfnt_off0000ffe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE2 11184 bytes
SHA-256: fb4bb9c3eb5720584b62bcd0ab8c84cf34481e1d7b3ca18d77fda5630de6227a
font_02_sfnt_off000125e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.