Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2cfb6f15a06611…

MALICIOUS

PDF

74.4 KB Created: 2021-01-02 12:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: fa17ceb32f44ee6eaa4064e011d7c955 SHA-1: 8813222a999720a7c5d355b1a55441a1574a5b89 SHA-256: 5c2cfb6f15a06611f3a1a1c5b2742ee8a819c37f51939bd58fdd64d20f386101
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure, indicating a link farm designed to drive traffic to malicious sites. The presence of a link related to 'Google Play Store developer guidelines' suggests a phishing or scam lure. ClamAV detection and ML classification further support its malicious nature.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=google+play+store+developer+guidelines In PDF document text
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/pijaronizig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_5f8ccc5e99c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_5fa13260eb3a8.pdfIn PDF document text
    • https://vomilanusasapik.weebly.com/uploads/1/3/4/4/134478463/wogutuluz.pdfIn PDF document text
    • https://ponasamexow.weebly.com/uploads/1/3/1/3/131398296/873c1c441e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_5f95152562f5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423188/normal_5fa92b920f883.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/e62bb88.pdfIn PDF document text
    • https://cdn.sqhk.co/varomapit/MihLo9M/sebige.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/aUDiePK/best_lagu_didi_kempot_terbaru_2018_mp3.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/6bed63.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/ghcgiXw/gravity_trampoline_park_glasgow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_5fc1e4f3cc4b4.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/lesutedofin.pdfIn PDF document text
    • https://wusikizojig.weebly.com/uploads/1/3/4/8/134883510/5361462.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE670 5320 bytes
SHA-256: b021dbb1081e4301a38eb914c75dd3ea89f1b1a326167f0df4849a7f040d944f
font_01_sfnt_off0000f8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A7 10516 bytes
SHA-256: ca7df432cf5785a55cefecadf5b27b6dea6e4cfb0d6db9f256bdfb5d8dd08c4a

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