Malicious PDF — malware analysis report

Static analysis result for SHA-256 7296c80112a4f341…

MALICIOUS

PDF

73.4 KB Created: 2021-02-25 19:00:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 33423ff8cad16af2231007e4eecc1f6b SHA-1: 04caae9eb9c9ec363103378cc3a2914a4b95ee25 SHA-256: 7296c80112a4f3418b7634f746e88985facabbff8b5231ff891382f26176ad91
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, indicating it functions as a link farm. Several heuristics, including 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM', confirm this behavior. The ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' and the ML classifier's high score strongly suggest malicious intent, likely phishing or malware distribution through the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://leonvi.ru/award?keyword=hbo+fire+and+blood+release+date PDF link annotation
    • https://cdn.sqhk.co/welosezu/Xiggcjd/46264867181.pdfIn PDF document text
    • https://napolapivu.weebly.com/uploads/1/3/5/3/135303388/3885a62c1d82b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501634/normal_600d069fa9905.pdfIn PDF document text
    • http://ooovseanalizi.ru/88591077821a25sr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453327/normal_60127b45a6477.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/yghrKhf/mod_creator_for_minecraft_pe_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/8Jspif3/16601324962.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418362/normal_5ff215d65de21.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/hVxjNzD/san_andreas_crime_city_hack_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456998/normal_6026317bf202c.pdfIn PDF document text
    • https://pimalikatirowo.weebly.com/uploads/1/3/4/0/134040386/9629511.pdfIn PDF document text
    • http://streamsweets.com/fenazopiridina_acido_nalidixico_plm0spn8.pdfIn PDF document text
    • http://dostafood.xyz/16070253293gv63c.pdfIn PDF document text
    • http://hookup154.online/dungeon_survivor_2_classesquk2h.pdfIn PDF document text
    • http://ig-socialmedia.xyz/62968448801bmw6a.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxisilogok/hcjchjc/shadow_stickman_legends_mod_apk.pdfIn PDF document text
    • http://ek-arenda.ru/why_is_my_keurig_slim_not_workingykxge.pdfIn PDF document text
    • http://gratoraama.website/zaxefomujuguxagisoxilzhlwg.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/a7Uiihc/29231293544.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/Kiea4ic/88841241874.pdfIn PDF document text
    • https://pemowazazafal.weebly.com/uploads/1/3/5/3/135385959/53e2bc24.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_off0000e370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE370 5000 bytes
SHA-256: 1728fb63f1143793a5b1e1e4f3261b72d5c6790cfb3a42339dae048efa8db945
font_01_sfnt_off0000f47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47C 10380 bytes
SHA-256: ff2c5eebdbbcd7cdab33e48b26c24abbf4abede472756d27031585752bd80784

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