Malicious PDF — malware analysis report

Static analysis result for SHA-256 de76f492a0965105…

MALICIOUS

PDF

76.8 KB Created: 2020-12-15 02:56:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8fdafb3bef086c8d9bbcd6d0e660e0aa SHA-1: 69f1e1cbebbc983f38231a75846b9c230c7f597d SHA-256: de76f492a0965105e5f5c48b1a3abb6df7d03567a4379a432b070c8cdd1f9c5a
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of embedded URLs, with at least two pointing to known redirector infrastructure. The presence of these links suggests the document is designed to lure users to malicious websites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself is indicative of a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=pokemon+emerald+hm+slave+flash In PDF document text
    • https://ninisajata.weebly.com/uploads/1/3/4/8/134869212/divore.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc702be8651a047519567d2/t/5fd7287e72b1137fa98f6b3c/1607936127203/kudamobulopub.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/york_ymc2_chiller_service_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ec6c8787e879896c16ae/t/5fce004d978da30c56229f3d/1607336014646/savunopulutotulazilewe.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/gugotixa.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/american_college_of_chest_physicians_antithrombotic_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/xelexefutevubunasip.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/asal_momentum_korunumu.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/jibagugadopisexewizumeju.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1116c11f6a41984869c2f/t/5fc4affca97599144e8d2779/1606725628735/lds_book_of_mormon_gospel_doctrine_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51dbabdb33045eedd6f3b/t/5fca82c4ad93297fcf0498c4/1607107270960/stay_alert_stay_safe_meaning.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66998d49dd124475a272a/t/5fcc3486c00f007ceada723e/1607218313463/rank_makers_shop_ring_light.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_off0000ed7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7B 5272 bytes
SHA-256: 580cbf4b3e488f41a9d85d66bad54c281aa278a71e15f0aee91ab293e784c0de
font_01_sfnt_off0000ff46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF46 11188 bytes
SHA-256: 5e8389f9be9b81ee50428dfa3f8b71881ef2f471b5327aedd199d0ff2401e10c

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