Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bdf659b3b0a77c1…

MALICIOUS

PDF

74.2 KB Created: 2021-02-27 19:34:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: fa69f1943ca041ff5a4bddc123bc44b2 SHA-1: d2cc3e3a213920e5f519911df5c1fc837e70308f SHA-256: 5bdf659b3b0a77c188d261e5b8ccce5af53c9e1500b1051590a5758abb8586f0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to 'Disney world hours'. No scripts were extracted, but the PDF structure and numerous external links indicate a phishing or redirection attempt.

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://gimoguvi.ru/strik?utm_term=disney+world+hours+january+2020 PDF link annotation
    • https://cdn.sqhk.co/rutisifelom/4H5RigA/venuvof.pdfIn PDF document text
    • https://lukibufipijuzom.weebly.com/uploads/1/3/3/9/133997252/vapapalerulamesebizu.pdfIn PDF document text
    • https://cdn.sqhk.co/surofowudula/ejie2gj/pugetimukuveroxube.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/cjF4aib/xemakopidifawalileto.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/djg1Uhg/bunikobewiluzoguvefo.pdfIn PDF document text
    • http://xeeewq.xyz/the_cognitive_behavioral_therapy_workbook_for_panic_attackswakwm.pdfIn PDF document text
    • https://cdn.sqhk.co/jedepazisu/nzHhh4M/mindset_is_everything_cat_poster.pdfIn PDF document text
    • https://lafefetakizin.weebly.com/uploads/1/3/2/7/132712235/0e264aa5.pdfIn PDF document text
    • https://cdn.sqhk.co/nixenexax/aicJ8hc/jowufakuzu.pdfIn PDF document text
    • http://macsk.space/conversor_de_milesimas_de_pulgada_a_milimetros14ydb.pdfIn PDF document text
    • https://setanalad.weebly.com/uploads/1/3/0/7/130775470/d02caa44fa8.pdfIn PDF document text
    • https://jawufilarom.weebly.com/uploads/1/3/6/0/136054640/13f6647d72.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/waxapoz/jazedipojirur.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/free_mailing_address_label_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/70846762401.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/play_store_waiting_for_fix.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_off0000e44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44B 5456 bytes
SHA-256: 66032e1bf334ead0e2043a2cb1d62d578ee668a5a2c9eeeb88e70dd47b9550af
font_01_sfnt_off0000f6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E8 11044 bytes
SHA-256: a86ee61e8422b3dd96c294b9c113eb8c81246ba2c50c579b962762738bd1c989

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