Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cf126ae29f2d64…

MALICIOUS

PDF

77.5 KB Created: 2021-03-16 07:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd93bba47e8c0ee56e06b9b465a1aeb7 SHA-1: e44797534044d282df421368f61c0d4588f61e2f SHA-256: e7cf126ae29f2d647defdb02eceb28429c2b3a0c181b3526248fe5c0bbf97324
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 0.9991

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/wix?keyword=wayne+county+sheriff+written+exam+study+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418001/normal_604b8fdbb7675.pdfIn PDF document text
    • http://rirelavemug.iblogger.org/24048446799.pdfIn PDF document text
    • https://gunefadube.weebly.com/uploads/1/3/5/3/135388078/bujivazedokijoku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384149/normal_5fcbaa03cbcb2.pdfIn PDF document text
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/vudoruwok.pdfIn PDF document text
    • https://witabavuwimob.weebly.com/uploads/1/3/4/3/134339013/gigimizelagasi.pdfIn PDF document text
    • https://matigolexa.weebly.com/uploads/1/3/2/6/132682665/tuvubepujedomekaber.pdfIn PDF document text
    • http://serodot.iblogger.org/52953378019.pdfIn PDF document text
    • https://goruxevuretu.weebly.com/uploads/1/3/4/8/134851502/3777766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405414/normal_600cacb736cdc.pdfIn PDF document text
    • https://mabunamu.weebly.com/uploads/1/3/4/9/134902385/7365106.pdfIn PDF document text
    • https://xafinuwexedigu.weebly.com/uploads/1/3/1/3/131379324/8848345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479454/normal_5fe391d221684.pdfIn PDF document text
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/1617953.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457563/normal_60028ccd4a3ec.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/a1c2d8a4-488b-49b9-9246-3bb37255b341/registration_key_visual_c_2010_express_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/fuxigan.pdfIn PDF document text
    • http://betejutejiw.rf.gd/5_dysfunctions_of_a_team_assessment_scoring.pdfIn PDF document text
    • http://wewolasa.epizy.com/fuzojeduvigav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e8c9b3-e690-4a4b-8643-60dd7fd78b70/organic_chemistry_john_mcmurry_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/47707470466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9cc8605-9096-4409-9a2a-6dd8ea909feb/a_christmas_carol_abridged_version_for_students.pdfIn PDF document text
    • http://giwitevezupe.rf.gd/forgotten_realms_campaign_setting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a69315df-7d08-47ce-a87f-f3c028b3054c/are_old_nancy_drew_books_worth_any_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/484d8344-41c6-4d7e-8f1d-5123ec54f5f2/toro_lawn_mower_dealers_edmonton.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_off0000eef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF6 5680 bytes
SHA-256: 5cc668a5961bdaa49672895bd386a3258efcd4afb4955a444fbcb6253a5ac890
font_01_sfnt_off00010241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10241 11080 bytes
SHA-256: 70858a6dc3848ebfeaa316e930396082ad8239d75881ea01097a990416d0d72a

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