Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67635ccb8940688…

MALICIOUS

PDF

68.6 KB Created: 2021-03-03 13:02:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6fe3ca2f22ad584e0201047eb3fad415 SHA-1: d5e2435c7b2f1186b7300505d93fe09e04658faf SHA-256: b67635ccb894068819c46fb5f8d0beb32bb10902fb018cecf4b21092fe54c373
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a link farm designed to redirect users to numerous external websites. The document body, though heavily obfuscated, contains references to search queries, suggesting a phishing or SEO-based lure. The presence of many external links, some pointing to disposable hosting, indicates an attempt to distribute traffic or host malicious content across multiple domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/award?keyword=how+to+program+cox+contour+remote+to+control+tv PDF link annotation
    • http://pitowiragomiwa.22web.org/deutsche_post_dhl_annual_report_2017.pdfIn PDF document text
    • https://remejatezikame.weebly.com/uploads/1/3/1/0/131070309/rukeba_jajipose.pdfIn PDF document text
    • https://palalolak.weebly.com/uploads/1/3/4/4/134443088/xofaxuki.pdfIn PDF document text
    • https://kajubogoxin.weebly.com/uploads/1/3/0/9/130969430/704ca82.pdfIn PDF document text
    • https://zulanamojo.weebly.com/uploads/1/3/1/0/131071117/movavasa.pdfIn PDF document text
    • https://rexuxoxef.weebly.com/uploads/1/3/4/0/134018301/gusivet_pavoxi.pdfIn PDF document text
    • https://jebelobuf.weebly.com/uploads/1/3/1/4/131452997/wekebarubaxanatud.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/firehouse_subs_calories.pdfIn PDF document text
    • http://befakupamexi.iblogger.org/eyelash_extensions_certification_training_ct.pdfIn PDF document text
    • https://fepepifufom.weebly.com/uploads/1/3/1/8/131872298/3e1c3b0768f8.pdfIn PDF document text
    • http://puwujodut.22web.org/46252669782.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xalimelipuv.rf.gd/the_handmaids_tale_chapter_16_summary.pdfIn PDF document text
    • http://valamujunitun.epizy.com/are_any_nail_salons_open_near_me.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/25003144283.pdfIn PDF document text
    • http://borinalujid.epizy.com/1413436761.pdfIn PDF document text
    • http://vibesegajepo.epizy.com/abituriyent_jurnali_2019_yukle.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/93795217613.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_off0000d11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11C 5256 bytes
SHA-256: 5c69df90dc613d1a8314197fffde9d42cacd29bc1b2298cad2b1a9760c2a6e75
font_01_sfnt_off0000e304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE304 9988 bytes
SHA-256: 15b12a53ab58ccf59f99ba3bb9c595e5bd915b4cf4c387a63f8d52e636e21da5

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