Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7eb118668b58e70…

MALICIOUS

PDF

76.2 KB Created: 2021-04-02 21:27:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6bf343f0ab1f335f50651680f0183db8 SHA-1: e291582a731d043e45c3b7d27eed1b72a19ae847 SHA-256: b7eb118668b58e7070e91ae641b2b53dc5b3fb6f19cb63ead72a60fda7cae401
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 0.9997

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/123?utm_term=uefa+champions+league+anthem+sheet+music+piano PDF link annotation
    • http://menformula.xyz/galaxy_s4_mini_backupl0sol.pdfIn PDF document text
    • http://hangookoil.ru/abu_garcia_pro_max_combo_academyxw6i8.pdfIn PDF document text
    • http://dopogabijup.mywebcommunity.org/statistical_quality_control_strategies_and_tools_for_continual_improvement.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/lihmicy/vector_security_reviews_yelp.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/star_wars_far_horizons.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/hagcHih/75091463048.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/jdkL8hd/12536587513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499995/normal_5fda1d8e650a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472479/normal_60505a4ddc72d.pdfIn PDF document text
    • https://cdn.sqhk.co/lowilufape/ijhhjj2/povegipafubisa.pdfIn PDF document text
    • http://beritox.medianewsonline.com/66658828865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_60482b6f884f0.pdfIn PDF document text
    • http://girlsbeach.space/4097958378cjgm3.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/f1c71917-8ad3-46a2-9e8d-68b7d94365e8/xukimuxofaj.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/nupujozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed047d20-8435-449a-85e7-225f96e50f5d/death_note_what_is_ryuk.pdfIn PDF document text
    • http://sojufuka.atwebpages.com/gemadegam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2991e65e-ff26-425b-9021-e51722982d4b/37743365375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd51612-8f65-4a4d-a589-49cbd934d5db/volume_of_a_cylinder_worksheets_with_answers.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/proficy_machine_edition_manual_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab5d696-51bd-4c79-8967-fae0a9cceda9/can_i_learn_law_by_myself.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_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 5324 bytes
SHA-256: e61f010c07bc45b009113055b7d4cffab6e2fe8c73588f317795bd31daee448c
font_01_sfnt_off0000fc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5B 11772 bytes
SHA-256: de4c0de28b99da79e031c7116c7de93f98c18cb5daa11a36c3482ee640893ca8

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