Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c9feea06b8c6eb…

MALICIOUS

PDF

70.4 KB Created: 2020-12-26 19:27:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d59cc8ecd4db65e1c3768a06d518467c SHA-1: 9ec729e83a0624a363125896e623418b6c395596 SHA-256: e8c9feea06b8c6ebf7d08788734139782c100b007ded20da97c8cb1b8fb6601c
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=mjr+adrian+digital+cinema+10+adrian+mi In PDF document text
    • https://lewofadexireg.weebly.com/uploads/1/3/4/8/134868993/togexamimani_vefima_wawulop.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/jfJhhhk/chuzzle_2_download.pdfIn PDF document text
    • https://vonolorijamitef.weebly.com/uploads/1/3/4/4/134452045/4960569.pdfIn PDF document text
    • https://bapepewemeg.weebly.com/uploads/1/3/4/7/134702997/gigutizo_jigod_ziderugama_rowoxibisotot.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/hfWilig/sisters_oregon_weather_cam.pdfIn PDF document text
    • https://gojafone.weebly.com/uploads/1/3/4/8/134891791/gemuz-sisadiw.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/wgijgjc/pomigogijiwigine.pdfIn PDF document text
    • https://zabavorurexezab.weebly.com/uploads/1/3/5/3/135314693/3010988.pdfIn PDF document text
    • https://cdn.sqhk.co/vibifexode/ighi1gP/dopizobofaxaxewa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/58061804859.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/kufijefizalo.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/mobujuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d449b53c-99a7-47e4-a19d-54cf03c5bd7d/40520127460.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/oster_pro_1200_blender_plus_food_processor.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/76246272479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4320bb1-6ad6-4ff2-bb15-9e9440544ec3/83306328746.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD91 5356 bytes
SHA-256: 718db6ef7999be664e04248e5ebeaaf58c90994a86e33d034c113e244da30a10
font_01_sfnt_off0000cfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC6 12136 bytes
SHA-256: 5e7e4b7492c41577e043234093ad36b4e9622f53eb29813a963c1f023d4ff37e
font_02_sfnt_off0000f649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF649 16272 bytes
SHA-256: 351cf2333c82f32f324f44db00a14441b38083ccd2c6ab8894d9a514b86433b2

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