Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0aff4101ec0de82…

MALICIOUS

PDF

73.1 KB Created: 2021-02-19 14:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 96f0d8f7a2382ab53539a3fdc1c5a49c SHA-1: 00c6f505443bdad0b8d9aa3f2245b3705a567f9c SHA-256: c0aff4101ec0de82d66c5d29a1dda7ca419443666439327464bc28c9400fc710
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt to exploit users by directing them to potentially harmful websites.

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
  • 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://bologen.ru/123?utm_term=how+to+set+up+a+lipo+charger PDF link annotation
    • https://firajapototirop.weebly.com/uploads/1/3/1/4/131452771/427477.pdfIn PDF document text
    • http://trysol.xyz/dogagaretimof38g7n.pdfIn PDF document text
    • https://datuzela.weebly.com/uploads/1/3/4/1/134109276/7805836.pdfIn PDF document text
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/newimofum_ninakuf.pdfIn PDF document text
    • https://bepixumute.weebly.com/uploads/1/3/5/3/135302933/1f30632a.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/gBPhdgf/67245625013.pdfIn PDF document text
    • https://cdn.sqhk.co/gituxogud/igjdhb9/samurai_flash_app.pdfIn PDF document text
    • https://dazuvekojuj.weebly.com/uploads/1/3/4/8/134863877/6329144.pdfIn PDF document text
    • http://nikaold.site/skyrim_destruction_magic_leveling_guidec44a6.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/epilepsy_ppt_downloadrplhw.pdfIn PDF document text
    • http://epipog.com/hp_officejet_pro_8600_plus_inkjet_multifunction_printerrd68o.pdfIn PDF document text
    • http://stav-games.ru/total_war_warhammer_language_pack_frenchrd2bm.pdfIn PDF document text
    • http://repair-planshetov.ru/the_investment_answerflhik.pdfIn PDF document text
    • https://ramowukegi.weebly.com/uploads/1/3/4/5/134508735/4500074.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/9825aa3dbcb204.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/putelekireza/79048456932.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/libertango_piano_solo_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/cmos_4001_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/tiwebuwod.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_off0000e020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE020 5248 bytes
SHA-256: 5201cd40a0116db405a49647b79fedfc0c785c2461046e8c562c76c4dd39a55c
font_01_sfnt_off0000f204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF204 11016 bytes
SHA-256: 0d34eb4ce0e4e2343edfb16865c4cc27c2854cde262a6d479adc7c5175c96287

Open this report in the interactive analyzer, or submit your own file for analysis.