Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62a4de15bf24631…

MALICIOUS

PDF

80.1 KB Created: 2021-04-03 00:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6fbc41bdf2980431b11cc3e4cc272370 SHA-1: b5aaa70363465eec91ae709271ce3733d24277b2 SHA-256: a62a4de15bf246317826dddc189f5372064a3554dc58afa077783c7f4a40377d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to obscure its malicious intent.

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://vilenefex.ru/strik?utm_term=soap+web+services+client+example+in+java PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450884/normal_6006366baf093.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_604e5ad633711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_600c3c45b1960.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/kofebowiridu.pdfIn PDF document text
    • http://exampl1214.com/honda_helix_250_service_manualxbpg7.pdfIn PDF document text
    • http://prizinsta365.website/74751383907c09gx.pdfIn PDF document text
    • http://menesoger.iblogger.org/acey_deucey_rules.pdfIn PDF document text
    • http://jofosisajagov.iblogger.org/report_illegal_dumping_austin_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/EOvjeel/67899510485.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454046/normal_6007bbec7c907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490949/normal_6041f33a8d41c.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/al1gWge/layton_drag_box_paver_for_sale.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/analisis_del_libro_la_tregua_de_mario_benedetti.pdfIn PDF document text
    • https://cdn.sqhk.co/puwidebudojo/hhQVjhY/navelavopive.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://vigorawosimop.rf.gd/algebra_math_league.pdfIn PDF document text
    • http://disoluje.myartsonline.com/air_circuit_breaker_siemens.pdfIn PDF document text
    • http://kiwizenodemi.epizy.com/48211442196.pdfIn PDF document text
    • http://vekemelegewimo.atwebpages.com/25730505132.pdfIn PDF document text
    • http://gegilifopom.myartsonline.com/23052734292.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/pdf_biology_class_12th.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD3 5408 bytes
SHA-256: a6ec5732fa4b4842a568a36e73518852c77218b1c0d729e8321f5ac3115f3c29
font_01_sfnt_off0000fe23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE23 11352 bytes
SHA-256: 2aeb233a446584102b71fbe27dae0160e80950ea8e740153ba5bda43629a37af
font_02_sfnt_off000124c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.