Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc5d02e5be9a9d4a…

MALICIOUS

PDF

76.5 KB Created: 2021-02-25 01:10:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 35a8481b5f5660e4dae71426b22071bc SHA-1: e4b491975270b2b85e27574682b647f55aa262d5 SHA-256: dc5d02e5be9a9d4a02b7131a89b7803d708519c3324916e013d7a6bffb91f798
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The document body, though heavily obfuscated, contains references to URLs and potentially lures, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the PDF structure and URL distribution indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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/aws?utm_term=how+would+you+describe+tequila+sunrise+cocktail PDF link annotation
    • http://tefitagesev.mypressonline.com/smart_watch_u8_bluetooth.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_602d678ace10c.pdfIn PDF document text
    • https://cdn.sqhk.co/jomurozop/jguTJjb/mcdonald_s_corporate_phone_number_in_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/ibzaifo/gomizaludapul.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/26122758870.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/wuwewomijufixabitam.pdfIn PDF document text
    • http://palejep.22web.org/56421516340.pdfIn PDF document text
    • https://cdn.sqhk.co/pawijilabu/9NBl9J7/catfish_boats_for_sale_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461204/normal_602015cd6fe3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451941/normal_6036d3a18fca5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416790/normal_6001510683fad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jisijuvod.myartsonline.com/synonyms_worksheet_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/speculation_synonym_formal.pdfIn PDF document text
    • http://nazonuretowu.epizy.com/coming_into_existence_crossword_answer.pdfIn PDF document text
    • http://pitowexenijodez.rf.gd/bredesen_protocol_diet.pdfIn PDF document text
    • http://virawumeritaxo.rf.gd/16783755446.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/mawalalakite.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/roxadonelepeda.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/nopojevuwu.pdfIn PDF document text
    • http://modudupudabu.rf.gd/kitchenaid_stove_top_gas_burner.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/29514928483.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/47038473010.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_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 5416 bytes
SHA-256: c8ec8f95d450597e74a0f772100ccf39f1edaeb6ac07f229178c60e4705de104
font_01_sfnt_off0000ffb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB3 11024 bytes
SHA-256: 803541148a2b0902cf41caf73a742dc7b55507211f9fecfa60170f4b6be053e9

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