Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5dcd225382ac3d…

MALICIOUS

PDF

75.7 KB Created: 2021-05-08 20:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 934f5c73226bf9e4c910d29edeb8b73c SHA-1: 9ad8333471286586191a7212aa9fae83ec482971 SHA-256: 0d5dcd225382ac3d1dafa57b994032769a93c8a767d53900816278a3fa3088c8
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://mezovuduw.ru/strik?utm_term=vitamix+blender+sale+amazon PDF link annotation
    • http://bigtittybella.com/ratetuz8o32e.pdfIn PDF document text
    • http://vovality.club/capitulo_4a-_4_asking_questions_contoxonv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_60214c19f0149.pdfIn PDF document text
    • https://cdn.sqhk.co/fejukomus/jcwjcuY/13083973875.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/jidBhiu/wiravu.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489852/normal_6045117aa4d4f.pdfIn PDF document text
    • http://nadakudege.iblogger.org/96781200009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464302/normal_5fdac91d8cd94.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/b3Ly5bx/extreme_3d_racing_car_drift_game_mod_apk.pdfIn PDF document text
    • http://pankreatitum.ru/985848730303or44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d699acd-3e5f-49a0-b19d-4ac9b4a98856/jevimeniwexugafubulad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5cd0486-d7cd-484b-8f39-5f308d4e5f35/wupozisutonazogomape.pdfIn PDF document text
    • http://segugixitibuka.epizy.com/sirubonefilewosopojeles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4cabefd-2619-4521-9b38-b6cc0ad7e6cc/32946616270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28971b8e-c408-4ccc-8143-c4f970dc767b/43739180947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/620e9e6e-0b65-4e05-b798-7ed766e32486/2009_ashrae_handbook_fundamentals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/397bce38-eb1a-4eae-b2c1-168bbb52d2ac/what_is_the_ancient_greek_religion.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 5192 bytes
SHA-256: 16bfb1818ce5c65317a8f89eb6052e31dbe0cc70597028b44d9bcee1fb62eb26
font_01_sfnt_off0000fcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC8 10960 bytes
SHA-256: ccdaad750b2ef09b99dfcc14a47ea5b9e6e7c44b29559846f2073a052fbf703e

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