Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70afeb608cff963…

MALICIOUS

PDF

80.3 KB Created: 2021-03-24 08:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c1f77a403b5817f97a29e99eab4b11c SHA-1: 9986667742698c7b2bc14a4fd5a132ea317e164f SHA-256: d70afeb608cff963fe5ad9c825cbb22e73b809e88515ad5f189fd1eb066197fb
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=list+of+spell+books+skyrim PDF link annotation
    • http://lefuduzitenazig.22web.org/temazeredixutasa.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/Iffhfii/rewepudaxupilo.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/fjehbJj/notes_notes_and_lists_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/CiUjfgg/human_resource_management_salary_with_masters_degree.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_5fdbde069958e.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/bjgsiaf/78340541936.pdfIn PDF document text
    • https://cdn.sqhk.co/kopakezoxek/fhcdIjj/20668969142.pdfIn PDF document text
    • https://cdn.sqhk.co/tezimafi/miaRhiW/definition_of_mandatory_reporting_in_aged_care.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416504/normal_5ff64b436f444.pdfIn PDF document text
    • http://dupipavigojas.iblogger.org/william_wilson_personajes.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugewameru/i1zqgib/xedamepawumogevuwetika.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/RkgeFjf/63887610635.pdfIn PDF document text
    • https://cdn.sqhk.co/nukusigemug/ifJrvji/download_jungle_adventure_games_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500444/normal_600a6dbc52c45.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/dIgdUBc/problem_solving_in_endodontics_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/zmrggGY/gunship_iii_vpaf_full_apk.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/7dd94356-9a45-4ac9-9523-0d3e72c1d745/english_textbook_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c90f7e8-dfcb-4663-bcdf-26b7e2ea8610/16063226493.pdfIn PDF document text
    • http://zazufazujinuzo.rf.gd/asphalt_8_airborne_for_laptop.pdfIn PDF document text
    • http://leliruwe.epizy.com/86888075099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e74b1f-a470-40c2-ae57-625675676930/25542683027.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_off0000fb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB81 5084 bytes
SHA-256: 8dcef7c31365fbd8858b52e6264e056e2c3b4af298737cfa92ee2b3a8c0b0c48
font_01_sfnt_off00010cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC5 11740 bytes
SHA-256: 17a46ed42db4aa597fcc9808649b08daf37f0bbae823f1d89165301913a79a8c

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