Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f17a493b9ebbc73…

MALICIOUS

PDF

66.7 KB Created: 2020-11-12 21:27:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e45d49f0aa96e60e2b7d7fb427740f6e SHA-1: 29144500be9881e03f8ada1198eb81a15b83a974 SHA-256: 4f17a493b9ebbc73fdcee9a171e29eb14c5e32598ba197599697b08284825b42
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=goldman+sachs+exploratory+program PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5f8cecfde6580.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/9600669.pdfIn PDF document text
    • https://jorimedazaget.weebly.com/uploads/1/3/0/7/130738946/286cf1.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/nakokezeteparitalak.pdfIn PDF document text
    • https://kotugelofamoxu.weebly.com/uploads/1/3/4/4/134403640/merid_duketusatategi_bijuwuwiwom.pdfIn PDF document text
    • https://lotogifivetizub.weebly.com/uploads/1/3/4/3/134309957/d4ddc6d73.pdfIn PDF document text
    • https://diwodineguxep.weebly.com/uploads/1/3/4/3/134305573/sokatavimevesif.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/5073021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d674b0a4-62aa-4911-b8ee-f2ab2d96a042/70381021493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e740e22f-1628-4b66-ad7f-6f7c4822ecf4/23425118680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d05738da-2bf0-48ab-a91f-56ce61b452fd/68826774090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f16d0b7b-7a0e-42e8-9b3d-24523382dbd2/rukesonadenovagemeseka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3661a87a-08ba-42d4-8d9c-121863c0d394/47838382071.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/comparing_rational_numbers_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/pewopapobijilevoruxu.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_off0000c6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D4 5688 bytes
SHA-256: 71ebf9f244003c5f084927f4fbdc667872411fef15fd923abaf40dc97a79992a
font_01_sfnt_off0000da17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA17 10536 bytes
SHA-256: d45d88ed79677991761e3f89d354984d779cb85d742539a958e13b24c284398c

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