Malicious PDF — malware analysis report

Static analysis result for SHA-256 730fd962a4ca0265…

MALICIOUS

PDF

76.1 KB Created: 2021-02-21 18:40:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7bcb588a25ca9eb8cd65936c5ded597 SHA-1: 20e4b8cc595374c48240a2ad05c8f0101d9b3a17 SHA-256: 730fd962a4ca0265158afe351992ce8dc511db31f99fe16fa187e3cb325eab3c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or phishing campaign. ClamAV and ML heuristics confirm its malicious nature, specifically flagging it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a spearphishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=best+rear+dvd+entertainment+system
    • https://xagufiwukana.weebly.com/uploads/1/3/4/6/134694649/3388131.pdf
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/wesofi_wotuxiriwov.pdf
    • https://begakidiwadagav.weebly.com/uploads/1/3/1/3/131397934/fopiwaloxi.pdf
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/gonevukaxap.pdf
    • https://sabalijazot.weebly.com/uploads/1/3/2/6/132695986/2982349.pdf
    • https://watumuguv.weebly.com/uploads/1/3/2/6/132695830/mususunemori_kalunegupa.pdf
    • https://cdn.sqhk.co/ponesigis/cuicN4I/my_melody_wiki_fandom.pdf
    • http://hayatevesigar.online/artsoft_lazycam_manualfmsoe.pdf
    • https://riwusivi.weebly.com/uploads/1/3/4/9/134900433/3062382.pdf
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/182a963bed.pdf
    • http://testvvd.xyz/rupepumedefiwakexawilam7m34.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dazovosugev/bticino_door_entry_user_manual.pdf
    • https://s3.amazonaws.com/megujobemegor/7652465905.pdf
    • https://s3.amazonaws.com/gurowozenupifi/google_blogger_app.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/4347414763.pdf
    • https://s3.amazonaws.com/waxapoz/dafubozidepugixedit.pdf
    • https://s3.amazonaws.com/lawakux/budget_planning_format.pdf
    • https://s3.amazonaws.com/pajeriramal/79418728490.pdf
    • https://s3.amazonaws.com/jifesu/12x16_storage_shed_plans.pdf
    • https://s3.amazonaws.com/megujobemegor/university_acceptance_letter_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb62.bin
6f04746b8ecc8445672aa79b5ec991a813395eb1ed4756ee821e95cddd30bf99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 5148 bytes
font_01_sfnt_off0000fcde.bin
abd871a39c0ff20f40a32708e7be0c942e6ae1271f9cbf6ebba215b67e7f7143		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDE 11612 bytes

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