Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30bdee4113385d4…

MALICIOUS

PDF

78.9 KB Created: 2021-05-06 11:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d479ab02ff1aab95881e122dfd957460 SHA-1: 0bd837c3c3190f11844f8d4f45f2b1a29feb2607 SHA-256: e30bdee4113385d49937f2e48d846ac0d5cb5823540d66ded21d50c4478ed13b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/strik?utm_term=thich+nhat+hanh+meaning+of+life PDF link annotation
    • https://cdn.sqhk.co/xugiwatokax/jcjfyK3/wimakefanesexovesejub.pdfIn PDF document text
    • http://wugipesirexoxof.mygamesonline.org/british_national_formulary_74_free_download.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/examen_toefl_itp_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/iciiFhb/44599219818.pdfIn PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/disezaja-jujek-dinuzikixo-newujoxer.pdfIn PDF document text
    • https://noparerekum.weebly.com/uploads/1/3/4/6/134639333/6599420.pdfIn PDF document text
    • http://kezijumedet.mypressonline.com/strategic_management_notes.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/foxijamatamitekajoxumajin.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/jarawaxanivu/saweligetoniv.pdfIn PDF document text
    • http://jonukufazok.rf.gd/biwivorikefutiv.pdfIn PDF document text
    • http://xirexadugimog.atwebpages.com/bepoxigu.pdfIn PDF document text
    • http://nuzelego.rf.gd/micrologix_1400_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/61043676042.pdfIn PDF document text
    • http://vekabibazegak.rf.gd/xavaledobelezunozopede.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/what_are_boundary_conditions_in_structural_analysis.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_off0000f9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 4968 bytes
SHA-256: aaa5bc211867f5737e9ffdd5988c83fe1c24f4be0b7c75efeef82de5e34d94da
font_01_sfnt_off00010a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A85 10036 bytes
SHA-256: 22e402f4d16664defad3f00bbea5a4f15209db173315f75a30b42c662d9c2b96

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