Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e3ba14f6e318ba…

MALICIOUS

PDF

74.5 KB Created: 2020-11-13 13:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9911b3bb6da9a5852d6b0cad1a7fe6ed SHA-1: dc74cb28b7deb1a9634026ddd929ee0043ce7a98 SHA-256: 99e3ba14f6e318ba2717be5df072c1b01e058f008d5574bd1e43114301cc708a
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://trafftec.ru/123?utm_term=sullivan+county+democratic+party PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443337/normal_5fada38157e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417220/normal_5fa97fac9aacc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424982/normal_5faad0dfbaee4.pdfIn PDF document text
    • https://pefopurez.weebly.com/uploads/1/3/4/3/134375846/tuniwalarapuz_bewegikumesi_pejodurenurix_zaxajoni.pdfIn PDF document text
    • https://toreliga.weebly.com/uploads/1/3/4/3/134335880/galumuludexed-petiwoz-lupubodaj.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/jipowumat/lunitujizikojumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e47b59b-9df9-4a68-a2d7-157e802e39c9/enter_sandman_clone_hero_download.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/mulapiwivivoroxal.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/15076459623.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/88158651675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91393994-354e-46db-b6d9-65e46c9c65e8/1008076604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe30c17d-23ef-46eb-8662-4d09c3246732/97774288275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b36649a-7e37-4b7d-af81-96b06d5e7ec4/62346475760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9bd4558-2498-4001-a0fe-50efce9cfd2f/gonudunagixamepeniduruze.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CA 5304 bytes
SHA-256: a53565bb300bdd4c29b27c3802b04b448a06a31cba8873cf2848641e2289519a
font_01_sfnt_off0000f7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CF 10848 bytes
SHA-256: dce944c7f389f46760f71e883c63846e239a263b4ddf6e2c7dacc5434896b2f9

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