Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fd7f30f5bdef96…

MALICIOUS

PDF

72.3 KB Created: 2021-02-01 19:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fa75fc6139bdf0fe6b90ecc23b60e070 SHA-1: 1ed55626e807879b902bcc3ae2a651b5bfff62c5 SHA-256: 80fd7f30f5bdef9644eb5c17855d68e765e96e237decbdc3d4a749c5c361e9b8
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 or trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to a repair manual, indicating a lure to entice users to click on the malicious links.

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://maypoin.ru/123?utm_term=2005+hyundai+accent+repair+manual+pdf PDF link annotation
    • http://jiludedo.iblogger.org/php_sscanf_format.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450259/normal_5ff225aa080da.pdfIn PDF document text
    • http://euroshopmn.space/rezudetewotebuwao1euj.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/hcUijKO/29371659571.pdfIn PDF document text
    • http://tibetterrier.ru/wasumizalenotodawobaaosqz.pdfIn PDF document text
    • http://bagajuz.iblogger.org/zetuwewuwexozunenuz.pdfIn PDF document text
    • http://mushygushysayings.com/vepojifunawod6k0d.pdfIn PDF document text
    • https://cdn.sqhk.co/vapatibu/ujahjgh/kemididax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474445/normal_5fe593f382dee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_6011ce56d9920.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/cgcL1jh/gufibedu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bosulug.epizy.com/guzanul.pdfIn PDF document text
    • http://rafetomobu.rf.gd/all_tenses_exercises_with_answers_doc.pdfIn PDF document text
    • http://xetitonaj.rf.gd/gross_hematuria_guidelines_aua.pdfIn PDF document text
    • http://godidab.epizy.com/povabupujopoxabokesas.pdfIn PDF document text
    • http://gekavitominugi.epizy.com/lulexesojozuzulaxumizeje.pdfIn PDF document text
    • http://rimamosapike.epizy.com/bubble_level_apk.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_off0000dc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6B 5624 bytes
SHA-256: 3c3e4af7d5ce198c2ebfc263269a5db7096ebac748d8124bcbd89a0a4875380e
font_01_sfnt_off0000ef70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF70 11040 bytes
SHA-256: 3823c0574720e4a3094b6ccaca90283370f0dad26232872e3cac3c09520d7419

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