Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ecad3d8dd2cd033…

MALICIOUS

PDF

76.1 KB Created: 2021-03-27 18:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6ccab68fa87c81ad285148b755a333e8 SHA-1: 55e48bef1b058d57a1ad412f0d698bdb9ae4f825 SHA-256: 1ecad3d8dd2cd0331ea7d7d01c7badcb40e2ba4004d23bba56badd93530d4967
186 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 6

  • 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.
  • 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://maypoin.ru/award?keyword=jet+airways+magazine+pdf PDF link annotation
    • https://cdn.sqhk.co/dakuwuwuzije/hfZFfdz/44961914884.pdfIn PDF document text
    • https://bewogataxatux.weebly.com/uploads/1/3/2/6/132695278/gowoguvoxopotaka.pdfIn PDF document text
    • https://suvejeko.weebly.com/uploads/1/3/1/4/131407233/a9f6a667824510.pdfIn PDF document text
    • https://cdn.sqhk.co/xekawiba/9gc7je3/swat_and_zombies_defense_battle.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CKsihKb/40504930244.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393790/normal_6004f6ddea684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475997/normal_60318ab4a4e4c.pdfIn PDF document text
    • https://pukexomupuko.weebly.com/uploads/1/3/1/1/131164185/filegibe-ninatopuwozowo-kofenasamelapin-dudinijafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485016/normal_5fd6310f164fe.pdfIn PDF document text
    • https://zaxefuki.weebly.com/uploads/1/3/5/2/135299090/pelod-zafagizu-wisupetelezi-vexuteladakof.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/wakuzidi/vevo_hd_videos_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa5dd0b-1b4a-4f7a-ba69-28b9018552f7/top_network_security_certifications_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7edc7b-7e09-429c-9fc3-6e3ab6f5e15a/38424973661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/203f0227-13ce-4c92-9da1-5d9393b3f2e2/favuratagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e9ab1b3-66ed-43c2-b037-9cbc89a66442/que_es_la_linea_alba_anatomia.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/teaching_approaches_strategies_and_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8307b053-1899-422a-88c8-aec7818f71be/rccg_sunday_school_nov_22_2020.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_off0000eaf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF4 5560 bytes
SHA-256: 21ab07f675203049b5450b261d845fdc7b4a3b5b33c6d7fecb0a01294bd2e4d0
font_01_sfnt_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 10912 bytes
SHA-256: 998739f41d322ea5a825ade5062a12ab14bc4e612cb3481db6544362fa7a1a2e

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