Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e33ca1854277ca…

MALICIOUS

PDF

71.1 KB Created: 2020-11-13 20:17:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 57a32ab60b8007a292e0067ff73225f6 SHA-1: db308e7f00691f1fc828975ad48fe91ae44ebd86 SHA-256: c3e33ca1854277ca0fd7816f46d63114cd0bdf3a2dcb5fa4bcfe0c10823de827
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 0.9998

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://traffine.ru/123?utm_term=astraea+type+f+avalanche PDF link annotation
    • https://gatofofuxiwiv.weebly.com/uploads/1/3/4/2/134265530/6487067.pdfIn PDF document text
    • https://seforurusux.weebly.com/uploads/1/3/4/1/134131879/9a520e5.pdfIn PDF document text
    • https://betoxugibujimiv.weebly.com/uploads/1/3/1/0/131071043/kasogumezo.pdfIn PDF document text
    • https://jiwanozote.weebly.com/uploads/1/3/4/3/134354006/nukuru.pdfIn PDF document text
    • https://kutufesivom.weebly.com/uploads/1/3/4/6/134632784/f5948667d194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_5f92ffae54fc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386094/normal_5f8f301fdfc6f.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/fewifuwu/sword_coast_adventurer_s_guide_trove.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/learning_guitar_book.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/english_aptitude_tests.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/17602149855.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/caldors_t_shirt.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/vpn_ios_7._1._2.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_off0000c9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E2 4332 bytes
SHA-256: e873a030ab479041fa021b363cbfe7d1786b1669c3eb4364d6d7a9ca99e7549e
font_01_sfnt_off0000d8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EA 5256 bytes
SHA-256: ba225358eeec4fe807673a1077a7a18a2515ca80d7ebd9b62b3146af0b4976a2
font_02_sfnt_off0000ead2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 10312 bytes
SHA-256: 97fbed5b330283c417c7ffafa627361f5b394e86e5a9ac933d1045eb828ccc88

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