Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6ecaa646b44d24…

MALICIOUS

PDF

78.5 KB Created: 2021-04-06 03:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f24e93331d91735744d50f6819357319 SHA-1: dfcbf453f6f72abde71f48e9b7cdeb1b7118a17c SHA-256: fc6ecaa646b44d24acb8d46f797cdbbc943c955f7cd546d3e819b9798b11e4b4
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 0.9993

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://ponafet.ru/strik?utm_term=vampire+diaries+season+8+episode+11+download PDF link annotation
    • http://wigomufeze.22web.org/personal_development_module_grade_11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5fd1e02ddcbd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444104/normal_6025a4185ee06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366003/normal_5fc7e52a513ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_604e331b72d39.pdfIn PDF document text
    • http://xufikefizot.sportsontheweb.net/44059032901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460070/normal_6057e9cd05a26.pdfIn PDF document text
    • http://virujurarajilef.getenjoyment.net/ways_of_the_world_2nd_edition_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402737/normal_5feb33c93a83b.pdfIn PDF document text
    • http://kiparegazeratax.getenjoyment.net/xijetut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375699/normal_5fde88e695c31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_604a333f5ac14.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/tales_from_the_loop_rpg_amazon.pdfIn PDF document text
    • http://bobiruropiles.22web.org/2nd_grade_math_money_worksheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kutusejanofoxem.epizy.com/29095822365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/730d36ae-12d8-44be-8997-2b0aaa8c6781/17695670935.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/minizujatopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d338f25-1b96-4c8a-a154-06b2e6a86cd2/should_sex_education_be_taught_in_schools_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/amsterdam_airport_map_terminal.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/how_to_add_applecare_after_90_days.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d60371bc-fc87-436a-a123-bf9245eab58c/53879678817.pdfIn PDF document text
    • http://molojagevatabu.rf.gd/salaxofebubatiliko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c6de24-3264-42a5-933c-e5b4d4620242/how_to_hold_a_lacrosse_goalie_stick.pdfIn PDF document text
    • http://wukosinigi.epizy.com/frog_dissection_lab_report_example.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_off0000f375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 5408 bytes
SHA-256: b81497ae85f9bf6429e3031efbae02edee1d7c37a82507432825a69dfc767b4f
font_01_sfnt_off000105dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DC 11984 bytes
SHA-256: d107693200ecc729298db169c7f0fd55f08d1d9ec0afcefb60a482bbadcf066f

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