Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabe2dc24f86e5ed…

MALICIOUS

PDF

65.4 KB Created: 2020-11-19 08:08:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d6bd8e4d9a07337bd1b674b3a5432dbf SHA-1: b9d568bf5497d66872da2f7a4ae633e79db98fb5 SHA-256: fabe2dc24f86e5edf36ce2c1a7379637ce08f2b863f42e4a24da1590d87a8df2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating it is a link farm, with numerous external links, one of which is a direct URL to a game download lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links point towards a social engineering attack.

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://traffset.ru/123?utm_term=clash+of+clans+download+apk PDF link annotation
    • https://gowubezu.weebly.com/uploads/1/3/4/4/134497845/guruvojijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f87f47025076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402520/normal_5f971300ef67a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5f957ba6875da.pdfIn PDF document text
    • https://zolegezuboz.weebly.com/uploads/1/3/4/4/134462972/e0f4e3164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401985/normal_5faab26616d31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5f943ef6410c7.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/panalipolifod/meramobezeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dbd44c8-d3e8-4b29-827a-48030e8d059f/8503705679.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/ccna_exam_answers_chapter_6.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/blaze_of_glory_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/vafinupokiriwikevarozoxun.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/losuf.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/goautodial_2._1.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/judidaguk.pdfIn PDF document text
    • https://s3.amazonaws.com/xanofamaja/pivimagigoxozoxemamag.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_off0000be2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE2F 5208 bytes
SHA-256: 9f3f8c265cb51f745cde6642c6e1757a338f56f72e80c0b69b093a78e2d62db3
font_01_sfnt_off0000cff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF9 11504 bytes
SHA-256: 7f15489d6b84e2d3980f510c03109d405e3f49e915a138b93facf1879b082235

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