Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8adf307d8124006…

MALICIOUS

PDF

66.9 KB Created: 2020-11-25 11:55:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ff6f85031606c059e37bd78e2a2aaf7b SHA-1: e0c3611e4d09c7db4d3e3d570cac1e35f6636a34 SHA-256: d8adf307d81240060bd2cfb92604f98920eb1acbac923f11ff1afd9089cf6456
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://traffine.ru/123?utm_term=nutrition+diagnosis+examples', is likely part of a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

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://traffine.ru/123?utm_term=nutrition+diagnosis+examples PDF link annotation
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/tezutonarut.pdfIn PDF document text
    • https://saniwuladekogek.weebly.com/uploads/1/3/4/7/134759819/lamimo-xovurumalanu-zadajab-nikudan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409123/normal_5fae1e9fc3733.pdfIn PDF document text
    • https://tolixolosunep.weebly.com/uploads/1/3/4/4/134403343/347008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_5f8dbc6445726.pdfIn PDF document text
    • https://zejaxosadakawur.weebly.com/uploads/1/3/4/3/134372542/9255202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469837/normal_5fb9b0bbaa41d.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/192ce38b.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/ed3c7c55-ea28-4c91-a390-3c40d826bb8a/61061524966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0042c015-d27f-4f9b-9f40-82de3b70a61a/ligatupajep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/907dffc5-6aa5-4558-98f8-23cd11512751/wobadawebasasamepiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c42e2e-a88d-4ed4-b6c1-6edeb3efd4ac/31740421271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d426ed84-a935-47f9-868b-e62b028739f0/sylacauga_high_school_schedule.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_off0000c8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B6 5316 bytes
SHA-256: 21192231ce89c62cd5f4e9fce07f9ace1d15fb774b7684eab1231bbbcd860e1a
font_01_sfnt_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 10740 bytes
SHA-256: 4df40c31440325a9e1ec402b2165af421ad183dde9d35569e3728d361e57e4aa

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