Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e35bb0e58d8d5c…

MALICIOUS

PDF

77.0 KB Created: 2021-03-01 03:58:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1c482c3edecc2ba3add439f27780b375 SHA-1: 680caab762810324dd14326624d682ed5c61c6c6 SHA-256: a6e35bb0e58d8d5c6a98577b501fb2ecbb4f33baec3375b2ce3c0b2275fb627c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=dive+suit+new+horizons PDF link annotation
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/jakurinixogik.pdfIn PDF document text
    • http://dagefose.22web.org/62678849461.pdfIn PDF document text
    • https://cdn.sqhk.co/suzironanes/bojhgdT/vepikenaxajunazuzi.pdfIn PDF document text
    • http://xuwamamesatopa.22web.org/sleep_revolution_arianna_huffington.pdfIn PDF document text
    • https://cdn.sqhk.co/pejinijew/eghggji/12659105599.pdfIn PDF document text
    • https://logomeso.weebly.com/uploads/1/3/1/4/131438572/vanemibabiwuz-gamixaxi-monunukegowutaw-dadisusetuzuk.pdfIn PDF document text
    • http://gezinuloxi.22web.org/game_bully_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/eNNhjjj/lisugowilebelulubibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lurimoromi.rf.gd/how_to_take_apart_a_revlon_hair_dryer.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/gasugumivus.pdfIn PDF document text
    • http://fepadegan.epizy.com/gantt_chart_xlsx_template.pdfIn PDF document text
    • http://velumosak.epizy.com/2738374177.pdfIn PDF document text
    • http://gazinopalevigem.rf.gd/90183008715.pdfIn PDF document text
    • http://gapisoga.rf.gd/medicinal_plants_2017.pdfIn PDF document text
    • http://ligexaxo.epizy.com/safibudaxisebomuzifufin.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/jamotigu.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_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 4732 bytes
SHA-256: 8904a2db7ba0aa80c55a97f29ed6dd1f2529e84e8a77d2fceb820ad87ec24c29
font_01_sfnt_off00010291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10291 10748 bytes
SHA-256: b1f847711d168374951dddcfb4d79e79057396e6f30ddcb83a260a14a571fcd2

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