Malicious PDF — malware analysis report

Static analysis result for SHA-256 e756789081f70f7a…

MALICIOUS

PDF

70.9 KB Created: 2021-02-17 16:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6e244f58b15b22e54c560103ff8dba55 SHA-1: b7017d51ef1df2397856418779741a7794d416d9 SHA-256: e756789081f70f7a4947ef516993635b54001c919b86a2b5d5fb63d373b9768e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, some of which are hosted on disposable domains and appear to be part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely leading to a malicious download or exploit.

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://maypoin.ru/123?utm_term=kenmore+70+series+dryer+schematic PDF link annotation
    • http://prizinsta24.space/wiley_anatomy_and_physiology_lab_manual_answersddor0.pdfIn PDF document text
    • http://feedbacrnz.space/5269125553rc99u.pdfIn PDF document text
    • https://perufagumitaxa.weebly.com/uploads/1/3/0/7/130738779/4325447.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407991/normal_5ffa2d34a4688.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374177/normal_5ffdfaf757e4a.pdfIn PDF document text
    • http://mmmmmme.space/35138438193my9yp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/60581656753.pdfIn PDF document text
    • http://nifekubipaxo.epizy.com/book_cover_design_ai_file_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/raminotonarodosa.pdfIn PDF document text
    • http://ragidunu.rf.gd/segowedigej.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/26236267268.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/calisthenics_beginner_workout.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/ambush_crossword_answer.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000c041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC041 5440 bytes
SHA-256: 89d5a65df811cc82431af4d97f6c9d75b8a06cfef4014f95c640ab0908b5b239
font_01_sfnt_off0000d2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A3 10024 bytes
SHA-256: 4afcfa3e3f584c9f88640ff410b82d836922c6908ca39561e567e8f2ab3917e0
font_02_sfnt_off0000f4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BB 17512 bytes
SHA-256: f2956c23ae7d7d55017e3c354ab5301a5fd15bf56f0e439b95354f79cd533d56

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