Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b5da2e59949036…

MALICIOUS

PDF

74.4 KB Created: 2020-12-26 17:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed090c4d45b3b8572cdf0797d4c6afda SHA-1: 152742aceda21e36ea85d8dbc5402dea4e65ecea SHA-256: 75b5da2e59949036fe6b656f52ae8e441803f2319570aa711bf67b1f80fe1d15
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The primary URL, 'https://traffking.ru/strik?utm_term=agar.+io+3d+game+play', attempts to lure users by referencing a popular game, likely to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=agar.+io+3d+game+play
    • https://cdn-cms.f-static.net/uploads/4414166/normal_5f9c2b5becfda.pdf
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f8e09ffa9f09.pdf
    • https://redawisifakaw.weebly.com/uploads/1/3/4/4/134481039/dojofekojejefov-zuwuvure-vumafoxukotuve.pdf
    • https://namunobuwuper.weebly.com/uploads/1/3/0/7/130776476/0ee2a12c79f8dbd.pdf
    • https://zegokovoni.weebly.com/uploads/1/3/4/3/134323662/zanilenodirilemo.pdf
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/c3749bd1f6.pdf
    • https://cdn-cms.f-static.net/uploads/4388405/normal_5f92c0e16642d.pdf
    • https://cdn-cms.f-static.net/uploads/4406463/normal_5fd18dcd6f6c5.pdf
    • https://cdn-cms.f-static.net/uploads/4479710/normal_5fc2b436da58a.pdf
    • https://static.s123-cdn-static.com/uploads/4374359/normal_5fc70fba62717.pdf
    • https://cdn-cms.f-static.net/uploads/4446789/normal_5f9d9b12c2397.pdf
    • https://gikemadisasov.weebly.com/uploads/1/3/4/6/134667176/4305652.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a555e087-4c0f-49d1-adde-570b572cbfc8/97093186491.pdf
    • https://uploads.strikinglycdn.com/files/405fc013-ba9b-4a89-996e-02e0f8f6a7f1/ditikaj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e732.bin
abeaa538be5c61d1191b633429a7fd9ac38835bab7038ec61a892b3061d516c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE732 5388 bytes
font_01_sfnt_off0000f984.bin
2a13809a34967d35904eb6b2ebe7cd1d411562b37501bd32fe39767395e0368a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF984 10496 bytes