Malicious PDF — malware analysis report

Static analysis result for SHA-256 300b3119f07f0501…

MALICIOUS

PDF

72.7 KB Created: 2021-01-05 09:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 04376fb98a7df35ccab1abc6f4fb1224 SHA-1: 1b067b4fa323c54d5e6b3b71782385abd372e69e SHA-256: 300b3119f07f0501a033b6fa463cdb0fb301e67be5161176c29be8c51c76958f
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagging it as a redirector link farm and a potential phishing or trojan distribution point. The document contains a large number of embedded URLs pointing to external PDF files hosted on disposable domains, suggesting a coordinated effort for SEO manipulation or to serve as a landing page for further malicious activity. The presence of a known malicious redirector URL further supports its malicious intent.

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://traffine.ru/123?utm_term=christmas+gift+list+manager In PDF document text
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/xufekele.pdfIn PDF document text
    • https://bukenazupe.weebly.com/uploads/1/3/4/5/134584610/kanoruzix-roginunake-natutazuwapa.pdfIn PDF document text
    • https://nexawukuvinu.weebly.com/uploads/1/3/4/5/134578226/6601870.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/fqSgchi/poxikopagejusetefob.pdfIn PDF document text
    • https://memagakotis.weebly.com/uploads/1/3/4/7/134760483/dfc8a02571.pdfIn PDF document text
    • https://vebajixumese.weebly.com/uploads/1/3/4/4/134483039/xexizapobufev.pdfIn PDF document text
    • https://cdn.sqhk.co/dipujabuxiw/gNCkWij/43545301786.pdfIn PDF document text
    • https://ronabamipiboti.weebly.com/uploads/1/3/4/5/134598089/xibas.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/1xihGH0/jokukirusemo.pdfIn PDF document text
    • https://cdn.sqhk.co/lojiwoxaz/Vujczge/4051_isle_of_pines_moneta_va.pdfIn PDF document text
    • https://magogojelut.weebly.com/uploads/1/3/4/8/134859832/tabudikixos-zutamenuluj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8618d509-5fb1-4772-ae71-f87a769cfa44/dataparezilate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd2da303-5126-4e80-b6fd-193e458379de/samurai_x_pill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a1caa6-3fb2-40c6-afc8-e5245d4bcdca/the_imperfect_tense_in_spanish_worksheet_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e3c4bb-a3d3-40d7-8b93-6607d737bf39/pokemon_go_raleigh.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_off0000e0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 5084 bytes
SHA-256: 2170e98e817e5769a252e3787e195c9a15b917eaae054c6b6d63dc5f22b9f390
font_01_sfnt_off0000f204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF204 10368 bytes
SHA-256: 61b17b3a078cf717659126093aa7bda8de3bf7ca2f5fd114d8173de10514a269

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