Malicious PDF — malware analysis report

Static analysis result for SHA-256 17109e0b7a9348f9…

MALICIOUS

PDF

77.9 KB Created: 2020-11-11 20:38:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1edb0a8edd6f299573e20d7eeb5c05d4 SHA-1: 9880dc6865f4267afe7be6be23e7d67c47a7a75a SHA-256: 17109e0b7a9348f992db2a3184c0c2c527551a1417a77a23349128e57cc72630
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://trafffi.ru/aws?utm_term=centro+escolar+university+manila+uniform PDF link annotation
    • https://sozejelef.weebly.com/uploads/1/3/4/6/134600180/1951515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383680/normal_5f99fb0087454.pdfIn PDF document text
    • https://giwirakixa.weebly.com/uploads/1/3/3/9/133999144/dinerotanogofovuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f86fea4421ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_5f89d08991ec3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f9b0f712e320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f87085e49ca9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480584/normal_5fa63da8ba3af.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/fd7e0091-ac83-47b8-8c7f-3f39678f9c03/25142474992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8357efd-19fd-4716-aad1-2cda1d869900/27226072554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18780412-abbb-4d2b-a6b3-4efc78f9098e/light_waves_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f6d11a-26d9-4c8a-840e-a0343356fefe/85362787752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27cecfc-b7ed-4f5e-994d-a4672ce83e7e/tamotewotibitapojukul.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_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 5096 bytes
SHA-256: 7c1c253d7dc3557ac512854edb1d16ef7082c25803876effa13de068fba0f544
font_01_sfnt_off000103ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EC 11780 bytes
SHA-256: 4b9b6f65255d51eb2e3562bd69209542867be1df0da9400b1672607798d556e2

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