Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9eb19f9d1929884…

MALICIOUS

PDF

73.0 KB Created: 2021-04-03 00:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d8c7951372327b0defa801f9e5058c69 SHA-1: e838d9b0cd6adb41efa886256b96be0073a5ba27 SHA-256: e9eb19f9d19298845f2c9aea986436582996f8e69be5b8f18a4153eedbe20028
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 0.9996

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://lozipotod.ru/award?keyword=attendance+monitoring+system+thesis+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475194/normal_6013bc7fd66ea.pdfIn PDF document text
    • http://notudokebifapaf.22web.org/sagev.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/Pofjflp/grand_theft_auto_v_the_manual_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_60105b36ea265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416490/normal_5fd19e32de421.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/28590058566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_604cf0261cee3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444098/normal_6008641b1e792.pdfIn PDF document text
    • http://fawejidiribap.22web.org/nitisunitanuretel.pdfIn PDF document text
    • https://cdn.sqhk.co/veladaxuzeba/ebRBETv/11675983009.pdfIn PDF document text
    • http://firejowetawo.iblogger.org/zetumosofodez.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/dmlgcG3/5427074773.pdfIn PDF document text
    • https://cdn.sqhk.co/peferitukofa/UidhYjg/spina_bifida_types_radiology.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_604655a378e0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5fd38d49ea538.pdfIn PDF document text
    • http://nejuwenazi.iblogger.org/usmle_pathology_mcq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kifagovatu.rf.gd/10781561683.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/94702987293.pdfIn PDF document text
    • http://redusaboj.epizy.com/womolelamonukuvawarul.pdfIn PDF document text
    • http://jufofokisib.epizy.com/transformers_g1_characters_autobots.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/best_app_to_annotate_ipad_pro.pdfIn PDF document text
    • http://laxolagodofomug.onlinewebshop.net/the_book_of_lies_aleister_crowley.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

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_off0000e095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE095 5628 bytes
SHA-256: c309263d29d5df635bde81dc9765f8dd34a4b81b4d956c8eccdc5169d565f1ce
font_01_sfnt_off0000f399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF399 10312 bytes
SHA-256: cd5703d194b2f7685204a1bde8cecaf2c8418dcc0ef4d7072455da1d5c6465a8

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