Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b7aeca28e66a816…

MALICIOUS

PDF

79.6 KB Created: 2021-01-23 13:05:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c745644be6c2a0d36e7acb34f0ab2853 SHA-1: b81a020f4cc2748a2047ce7a2afc8295040e51d8 SHA-256: 9b7aeca28e66a816eb630226c7c2991603c05eead8d1968b38a8e4fd96579bd0
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains a reference to 'Champions league head soccer games', likely a lure to attract clicks to the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://traffnew.ru/123?utm_term=champions+league+head+soccer+games PDF link annotation
    • https://kixumiziri.weebly.com/uploads/1/3/2/6/132681985/kowetuxojure.pdfIn PDF document text
    • https://jibisovewa.weebly.com/uploads/1/3/4/6/134653871/vodipaxatomatosatufi.pdfIn PDF document text
    • https://topemarepebide.weebly.com/uploads/1/3/4/3/134316461/jetenogi-tadavotofi-robumute.pdfIn PDF document text
    • https://rogebanapixiwo.weebly.com/uploads/1/3/5/3/135343373/61fbc7b.pdfIn PDF document text
    • https://sezitekiporav.weebly.com/uploads/1/3/4/6/134627959/8164912.pdfIn PDF document text
    • https://xovesoxak.weebly.com/uploads/1/3/0/8/130813458/7680805.pdfIn PDF document text
    • https://sunapibabe.weebly.com/uploads/1/3/3/9/133999858/vufanofom.pdfIn PDF document text
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/nisadotibozimoxoki.pdfIn PDF document text
    • https://kedaweva.weebly.com/uploads/1/3/4/8/134895813/turuduxufukomewelu.pdfIn PDF document text
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/kakonakilexajiw-pomofibo-salutunibevo.pdfIn PDF document text
    • https://xetutimi.weebly.com/uploads/1/3/0/9/130968997/wenamume.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/blank_timeline_template_for_students.pdfIn PDF document text
    • http://jometuxinuvalal.epizy.com/28331957477.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94E 5392 bytes
SHA-256: 59a31547890fe3481f96c623b8f94e5b83fb7b1b39d44c043e06824e7f606655
font_01_sfnt_off00010b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B70 11172 bytes
SHA-256: 324fde48c26d80fc080e23315560e8521c08f387315c04a3a2437623f5c3c9c4

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