Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1178f69910416ab…

MALICIOUS

PDF

83.1 KB Created: 2020-12-23 23:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b15c5ca2d28dfbe03262c07629fd0124 SHA-1: 1ce6499be170fddc700c9f06f41ab927022af605 SHA-256: b1178f69910416ab4a7b517dd3c2bf76228cf2f20d1673cbbfe76c04bf937728
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One prominent URL, 'https://traffine.ru/123?utm_term=king+of+queens+educating+doug+script', is directly associated with the document's content and likely serves as the primary lure. ClamAV detection as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' further confirms its malicious nature, suggesting a phishing or trojan distribution intent.

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://traffine.ru/123?utm_term=king+of+queens+educating+doug+script
    • https://cdn-cms.f-static.net/uploads/4419846/normal_5fbdc4914ac72.pdf
    • https://cdn-cms.f-static.net/uploads/4413590/normal_5fd9c074d923f.pdf
    • https://cdn-cms.f-static.net/uploads/4392651/normal_5fa144a52af11.pdf
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/gilil-kugekaxi.pdf
    • https://static.s123-cdn-static.com/uploads/4372086/normal_5fc66a0f4d0f9.pdf
    • https://static.s123-cdn-static.com/uploads/4447085/normal_5fd02b7b9d5c3.pdf
    • https://kebakiwaranug.weebly.com/uploads/1/3/4/3/134317860/f00d82ae5ad.pdf
    • https://cdn-cms.f-static.net/uploads/4451929/normal_5f9f299073df1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jokotaziweluge/firejojaniteku.pdf
    • https://uploads.strikinglycdn.com/files/a069f585-328c-4d44-9a03-473e69032319/94182791553.pdf
    • https://uploads.strikinglycdn.com/files/01b00e45-1ffc-407a-8719-66f46b2c3c58/gulukekinikefevigo.pdf
    • https://s3.amazonaws.com/dorulusof/buyhatke_flight_comparison.pdf
    • https://uploads.strikinglycdn.com/files/cb5d7e1e-2642-47b1-becb-03260f5ba13a/outward_tsar_stone_weapons.pdf
    • https://uploads.strikinglycdn.com/files/31028a78-a7b1-4145-86b5-269726b4ebd8/quotes_about_greed_and_selfishness.pdf
    • https://uploads.strikinglycdn.com/files/1305f257-8c36-40a4-b765-e681eddff03e/aveeno_clear_complexion_foaming_cleanser_walmart.pdf
    • https://uploads.strikinglycdn.com/files/13e571db-0c7b-48e2-8691-b436df77d891/dijulinulewowogifaxafux.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_off00010795.bin
2928911f19f87a164d98d1afbde904a47626e0f0ef3954111a69b903277b8020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10795 5384 bytes
font_01_sfnt_off00011a00.bin
9a55116f17933696e6ad02ae8fbf5dd08be05d37e4eeebe39d38c9aacbbf4ef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A00 10932 bytes

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