Malicious PDF — malware analysis report

Static analysis result for SHA-256 10014ffd43147caf…

MALICIOUS

PDF

75.6 KB Created: 2021-02-04 03:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dd380cd8c19c5719f5086e3e86655656 SHA-1: e746cef3a2cd426aa29afd27494321fa93abd185 SHA-256: 10014ffd43147caf3e9978c3bb6691e82f935ed510f95dc107363098acc39880
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, mentions 'Dometic duo therm instructions', likely a lure to disguise the malicious intent of directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/123?utm_term=dometic+duo+therm+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501042/normal_6008c054ccf4b.pdfIn PDF document text
    • http://bodyita.space/97962855790nf11c.pdfIn PDF document text
    • http://want-seo.ru/61040428304n53kh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444371/normal_60160644783d6.pdfIn PDF document text
    • https://vimexizud.weebly.com/uploads/1/3/4/7/134755563/2225125.pdfIn PDF document text
    • http://worldthailand.fun/laboratory_skills_checkup_4_identifying_errors_answersb0p5l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423780/normal_5fe28b8e8098d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418970/normal_5ffdc18f91c71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465705/normal_5fcba5d6cb798.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5ff282b19eb39.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
    • https://s3.amazonaws.com/zowejunef/13186801181.pdfIn PDF document text
    • http://limazajot.rf.gd/pagodoruzimavumojoximeju.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/katy_perry_firework_figurative_language_answer_key.pdfIn PDF document text
    • http://dejudunobagozut.epizy.com/australian_casual_employment_contract_template.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_off0000dc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8C 4816 bytes
SHA-256: 179b3465ea11d430a19631ef6c617f502b03246875ee7c2e76548a36ee9aaa6e
font_01_sfnt_off0000ecc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC6 11528 bytes
SHA-256: 5bea25e008f0fc3a58cdd520589c5dd0a5e72f479db190158edf904649d8e881
font_02_sfnt_off000112df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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