Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59e75f32c462375…

MALICIOUS

PDF

107.2 KB Created: 2021-02-10 09:56:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 017e015c386fd05241abc0ae13bb5c83 SHA-1: ed0c0fbdb7198dd91146ed5f13c645fa84d08026 SHA-256: a59e75f32c462375cda3bc6dc84a0bc4c2687ebe0fd34fbe6956384a7fa70433
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure designed to redirect users to potentially harmful websites.

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://jacksth.ru/wb?keyword=cement%20manufacturing%20process%20pdf%20file PDF link annotation
    • http://6gusevshop.website/doluvepifbnk7c.pdfIn PDF document text
    • https://fiziwiminika.weebly.com/uploads/1/3/4/6/134686918/b50911de98d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380078/normal_5fcb10f6c842a.pdfIn PDF document text
    • http://levantegroup.net/bzun_earnings_report_datern1j3.pdfIn PDF document text
    • http://craftsmansmetics.com/call_block_app_for_android_freealsn3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408720/normal_5fca60bf26c70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_600e6c3787526.pdfIn PDF document text
    • http://differencecheats.net/foundation_science_physics_for_classwytd9.pdfIn PDF document text
    • http://usmileofficial.site/vsco_apk_full_packjnjzy.pdfIn PDF document text
    • https://berekiba.weebly.com/uploads/1/3/1/4/131482976/1177815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459640/normal_6008cb9c049ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369659/normal_5fff2b391ceb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_6023111576619.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bixerexexotepe.rf.gd/tulalap.pdfIn PDF document text
    • http://nanaxaj.rf.gd/wekinuruzal.pdfIn PDF document text
    • http://xurorovesi.epizy.com/thermal_conductivity_of_galvanised_iron_sheet.pdfIn PDF document text
    • http://sewasijibakel.epizy.com/sezepinupet.pdfIn PDF document text
    • http://beninoduvewer.epizy.com/defective_product_report_ema.pdfIn PDF document text
    • http://sulosuduvemog.epizy.com/android_google_login_not_working.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A44 5380 bytes
SHA-256: bfadedc772990a598628701cefb350b8bc789207e8e58b4ffd147ce784a29e1c
font_01_sfnt_off00016c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C71 10876 bytes
SHA-256: 0d3be0b03e56869c2c78d579784d87a42fc3503f914a44573b00d2f3dda8857b
font_02_sfnt_off00019125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19125 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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