Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4744d68828624ca…

MALICIOUS

PDF

74.1 KB Created: 2021-03-06 08:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0ece94e2cae2d6c6345613ca6aa5cfaf SHA-1: 93b42a58f3eb4975b791179503961347180c6597 SHA-256: a4744d68828624ca995b52cf6023ab95560810e33cc1265b9d3755af5eb40400
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://bologen.ru/123?utm_term=rogers+park+temple+texas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491673/normal_6037f1c468857.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/ktm_790_duke_owners_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/QmdHjig/booyah_pad_crasher_jr_frog.pdfIn PDF document text
    • https://naxozafo.weebly.com/uploads/1/3/1/4/131483391/3884749.pdfIn PDF document text
    • https://moxeguzivega.weebly.com/uploads/1/3/5/9/135965209/3637347.pdfIn PDF document text
    • https://cdn.sqhk.co/jadojibam/bWIziij/dragon_evolution_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/ihgAjcI/billie_eilish_lockscreen_tumblr.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/xojevitagiremikeb.pdfIn PDF document text
    • https://cdn.sqhk.co/gotevobogefa/ipjbihO/50738104190.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/jgBkifd/nasiladurazuzewigox.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/uihehiB/invasion_of_iraq_casualties.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/hsgfjc8/daiwa_double_clutch_lures_bcf.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/9igKjia/36833982881.pdfIn PDF document text
    • https://cdn.sqhk.co/xeviremal/WIgek9b/gym_tire_flip_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474739/normal_602ff9a7941d1.pdfIn PDF document text
    • https://tineminelebon.weebly.com/uploads/1/3/1/6/131606156/jotinudimogik-kikewukadugep-rutus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D9 5276 bytes
SHA-256: 9fb8b4ba5cac9a634c488756ebcd1cac95b9cfec2d2af094f44907206023e98f
font_01_sfnt_off0000f6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C7 10880 bytes
SHA-256: 6c434afc0bfa481b08c743d1a4afb65b0b736f497f95d4be26170f642006fb1d

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