Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f649df400b0c0d5…

MALICIOUS

PDF

76.5 KB Created: 2021-03-23 14:12:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9f83ca62b6a72449d973c449022dca47 SHA-1: 998784e7c02beb3aa576cb03833662d287789e6d SHA-256: 0f649df400b0c0d58fc0e8932e0518ac07649ee7b33f8b6dbb5c8b8401f3f110
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=the+man+in+the+high+castle+season+4+trailer+song PDF link annotation
    • https://cdn.sqhk.co/petebeki/je0jbhJ/31674660719.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/gedHdso/r_type_leo_mame_rom.pdfIn PDF document text
    • http://vofefipegurixu.iblogger.org/avengers_endgame_wallpaper_iphone.pdfIn PDF document text
    • https://nipixajivoru.weebly.com/uploads/1/3/1/4/131436983/savofov.pdfIn PDF document text
    • https://putazixuxul.weebly.com/uploads/1/3/1/3/131379121/gafaseru.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/ZTggjiU/91448837935.pdfIn PDF document text
    • https://cdn.sqhk.co/ronelejibir/dTsMcSO/64644462775.pdfIn PDF document text
    • https://pofomagod.weebly.com/uploads/1/3/1/4/131483550/dolejiregum.pdfIn PDF document text
    • https://pazijovipa.weebly.com/uploads/1/3/4/3/134327002/7740438.pdfIn PDF document text
    • http://xivetaf.22web.org/list_of_paramedical_courses_after_12th.pdfIn PDF document text
    • https://kekufakaxuw.weebly.com/uploads/1/3/2/7/132740700/vufodekina.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/bidgfgd/baking_dessert_recipes_from_scratch.pdfIn PDF document text
    • https://cdn.sqhk.co/gadapapar/WqDmgc1/44646208321.pdfIn PDF document text
    • https://vupixesit.weebly.com/uploads/1/3/2/7/132740805/megafalaw.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/hbEQthh/iowa_duck_hunting_seasons_2020.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/cc21ca67-0cae-42f1-b8ac-b024e6743a92/relamijikubasunavokodaro.pdfIn PDF document text
    • http://nuxidowu.epizy.com/resumen_corto_de_los_hermanos_karamazov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563b662c-d584-4e35-9226-3bd7e12547d3/60249104224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738d9b60-5596-47cc-ba01-00e4bf1a1069/how_to_tie_fishing_rigs.pdfIn PDF document text
    • http://bekekujizaduk.epizy.com/gawusemorimajulore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1ff4c6-8e33-4e7b-8aa0-0d5da8c0e8f7/tewaviloloxosolosedopewi.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_off0000ece6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 5248 bytes
SHA-256: 5bfc0aefb0b7848260eb970ff033ba8111d3084d063f8fc7875d7c35f42a877c
font_01_sfnt_off0000fe9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 11056 bytes
SHA-256: 179fc544034ad9e85a29c4c2b7e5b6dad1b656c8eb5fe263fc6ff00b15b631ea

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