Malicious PDF — malware analysis report

Static analysis result for SHA-256 0faa2cf53b19c8eb…

MALICIOUS

PDF

74.6 KB Created: 2021-01-08 02:32:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 680dfa7690139ff3718d6d515d6743c6 SHA-1: 3b90e15c8633e5bc5e45331dae2a542c0a5faa12 SHA-256: 0faa2cf53b19c8eb4a2acce58bb7ced894fcb44d1ec70d9e3f6d60a8c6a37b31
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 or known malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body itself is heavily obfuscated and contains metadata that does not align with typical document content, suggesting it's designed to obscure the malicious links.

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
  • 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://traffmen.ru/123?utm_term=1966+ford+fairlane+427+r-code+for+sale In PDF document text
    • https://cdn.sqhk.co/vavuvalegel/1UgdIAk/motogp_coverage_channel_5.pdfIn PDF document text
    • https://pobufulali.weebly.com/uploads/1/3/4/4/134494274/92ae35.pdfIn PDF document text
    • https://sawifumoz.weebly.com/uploads/1/3/1/3/131380604/5408292.pdfIn PDF document text
    • https://jidevamomibowi.weebly.com/uploads/1/3/1/4/131437101/7376219.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/b01e903.pdfIn PDF document text
    • https://kifobanirijo.weebly.com/uploads/1/3/4/5/134595275/3861225.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/4272518.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/LFjiaGA/game_gear_mini_hack.pdfIn PDF document text
    • https://lemisisax.weebly.com/uploads/1/3/4/4/134494561/gakofejapagapabami.pdfIn PDF document text
    • https://rugeponejap.weebly.com/uploads/1/3/4/4/134487210/jinaragateg.pdfIn PDF document text
    • https://jiketajaw.weebly.com/uploads/1/3/4/4/134464131/monaguseja.pdfIn PDF document text
    • https://sizomejuxitiz.weebly.com/uploads/1/3/4/7/134748976/nitoxenagu-pusugegod-siziguw-farem.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/zamemigojat/37247455902.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/gavixafiru.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/pivudedeweronop.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_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 5612 bytes
SHA-256: 6548abb9e7defc65d5749271046bc28df543c4435e5c0f0567253b13cc28210d
font_01_sfnt_off0000f9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DF 10452 bytes
SHA-256: 2a749e97c2bce5bf88721105e1c1533cb62b1dc7f290ef78373ea6952cf5feae

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