Malicious PDF — malware analysis report

Static analysis result for SHA-256 7523def40bac50aa…

MALICIOUS

PDF

72.3 KB Created: 2021-04-29 17:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 348c9929e87acf742f8567527e8d5c12 SHA-1: b921bdeaa13bc797118e3af4c7396e0b233c933c SHA-256: 7523def40bac50aa7190ebd6c9eb4b6b19d5ac57c13f612b2254e6a7dac25122
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://crophysi.ru/strik?utm_term=chauvet+dj+obey+70+dmx+controller PDF link annotation
    • https://cdn.sqhk.co/wemonamo/hBUjhWF/xakupafog.pdfIn PDF document text
    • https://cdn.sqhk.co/manigonodapu/4jg6giX/drumstick_chicken_air_fryer.pdfIn PDF document text
    • https://cdn.sqhk.co/mojazejo/IXghhie/indices_bursatiles_del_mundo.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/d5NhrJS/wawosalewesomixudupabilo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bomigezi.epizy.com/blizzard_warcraft_3.pdfIn PDF document text
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_7bed62a448f94be4add72326e297ecf5.pdf?index=trueIn PDF document text
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_abc4e98485fb42ae9fc6b6486f9e43df.pdf?index=trueIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_070d87ba6aaa4138b214a8ec9bc6a2c0.pdf?index=trueIn PDF document text
    • http://wosewusaboku.epizy.com/.pdfIn PDF document text
    • http://ximogubofew.epizy.com/dengue_blood_test_report_format.pdfIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_f4c9ef6ceed04d809aacd4026fc5a13a.pdf?index=trueIn PDF document text
    • http://puwaviferu.rf.gd/9109611968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff8d0035-b44f-4c6f-8544-c7995b8da1c4/kivesilifiwatafi.pdfIn PDF document text
    • http://rewifavad.epizy.com/16799537259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c94f6ef-3fa6-4d1b-a032-4c3dfc8753a4/42717490028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02bfb5ae-0f1d-47fa-bd86-6aa926d850ee/50836276068.pdfIn PDF document text
    • http://fisuzes.epizy.com/does_technical_writing_pay_well.pdfIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_00ef823a579d447aac797aa1f476c138.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FB 5572 bytes
SHA-256: b350bd2e9df73e7c567afc3b5f8ef09972b0ea2bb782199afa28ac98c6e5026c
font_01_sfnt_off0000ead6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD6 12736 bytes
SHA-256: e32d10e5ee450b5c0190a0ce73775e17f47273469b105bcdbc500bdcc951441b

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