Malicious PDF — malware analysis report

Static analysis result for SHA-256 99626d2148398dd0…

MALICIOUS

PDF

76.8 KB Created: 2021-01-09 17:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 639f30a5433c629fc8b6c5ede07d5552 SHA-1: 39b6e761a4480a605485358bc0b82ae40f0166ec SHA-256: 99626d2148398dd042700662980329b011689198d24091da02d3ef13eb69fd2b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO poisoning tactic. The primary malicious URL identified is traffking.ru, which is likely used to host phishing content or distribute further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/aws?utm_term=christine+movie+about+reporter PDF link annotation
    • https://cdn.sqhk.co/movijomo/sLghWia/patriots_packers_score_now.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465930/normal_5ff466af9d0fb.pdfIn PDF document text
    • https://wupanotowi.weebly.com/uploads/1/3/1/4/131406855/5302397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476578/normal_5fa5f832e26b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381102/normal_5fc7584c50538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480598/normal_5fa9685b9b3d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447465/normal_5ff606d81e782.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/kigijJ6/zujuzanojuwikogegoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413567/normal_5f9f8c4c0f565.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/7e438e9f-7b01-4fa0-ae15-55fdff0d19c7/gipugufubulakem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b80284ef-9d52-46e0-8149-245a0e75f2ed/lakogewapobab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2389e49-6de5-4ab7-beeb-092b4b5cb7e8/kanda_shasti_kavasam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e813912-f485-4453-acf5-d5449e57bd29/97743422891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4464bab-d366-4b56-b10e-4d518dc65532/47078220328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9229bca6-f64f-4a13-8d55-990ddd6e3c39/537889518.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_off0000ed5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 5132 bytes
SHA-256: feb35fe91537484baac7e75fd2c148c5bdbb9e899bc5e4a1b5f8efe355cc2895
font_01_sfnt_off0000fe9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9C 11584 bytes
SHA-256: a2262b28537ac45cbef2a1651179b233f51f1fc52748c5825161a99bb3bdc2cf

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