Malicious PDF — malware analysis report

Static analysis result for SHA-256 d275c213c7ce8040…

MALICIOUS

PDF

67.1 KB Created: 2020-11-23 22:07:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 570049c8046371b54592c920ee6b13da SHA-1: 755f70439dcd074acb4b83085fd345b3bb0da532 SHA-256: d275c213c7ce80408c08919359f65d7e40702678d27700d52161c3ed54696bbf
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains multiple embedded links, with critical heuristics identifying them as pointing to known malicious redirector infrastructure and a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of malicious URLs is sufficient evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=go+math+grade+8+online+textbook In PDF document text
    • https://kodikitowi.weebly.com/uploads/1/3/4/7/134768405/kujovejisenexepitoba.pdfIn PDF document text
    • https://tifunubuxeji.weebly.com/uploads/1/3/4/5/134523212/nulafowomizik.pdfIn PDF document text
    • https://marotebage.weebly.com/uploads/1/3/4/7/134712984/janowasutijobuxeda.pdfIn PDF document text
    • https://furutivox.weebly.com/uploads/1/3/4/3/134360368/tudozu-jezinow-girolemafip.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/widofafane/listening_vs_hearing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe918c42-f7e4-42cd-bd4f-e464069642eb/bixiwufagadavaberu.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/park_tool_big_blue_book_of_bicycle_repair_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/aeolian_harp_chopin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48257c5e-080c-4768-8b07-cb7925cf28d6/twenty_first_century_fox_investor_relations.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/13331362843.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/loud_music_roblox_id_bypassed.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_off0000c8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E9 5556 bytes
SHA-256: c130e271a8f48225a67e95c072964fb6ecf51a1047b7131ea3443f5e2332d999
font_01_sfnt_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 10772 bytes
SHA-256: 70ebbab3f7f98f0980aa90d0307513e611e42d1025e76cf162f845069e092090

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