Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff07ff73b2a3deb3…

MALICIOUS

PDF

76.9 KB Created: 2021-03-27 22:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 730a1c55753a3455b797888d5c8621c5 SHA-1: 097b6e09b6a82b0100e4912ececa836c387a8d5a SHA-256: ff07ff73b2a3deb30cbf4b49acff5370e3c2d83a3cf14e7038d2f77f61dc3429
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://bologen.ru/wix?keyword=radioactive+dating+game+answer+key PDF link annotation
    • http://radanews.site/favimowuxinaposidomauxyyo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_605dba258b68b.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/supreme_mathematics_lessons.pdfIn PDF document text
    • http://ludshop.xyz/zobutirifelinomuli17fty.pdfIn PDF document text
    • http://bbcua.site/tavizunobasakuw5ljr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490380/normal_60009099cec5a.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/nilovemaxatab.pdfIn PDF document text
    • http://new-volosi.ru/kaxakowixelujadif1vhp0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494451/normal_5fffcffc5d1d1.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/alphabets_coloring.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_600e3fc98a009.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_96ef4aec7e78452294df1758d8010b51.pdf?index=trueIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_fd26320cc9ab4d659b1158c8b915600a.pdf?index=trueIn PDF document text
    • http://gibidapasajug.atwebpages.com/kedajepodemojoxavukugix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8d3e6e-f57f-4b28-8b51-461a569d776b/jujexogakujipetot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c42bd8-053c-49ee-8e8d-34f690f84b04/2020_monster_films.pdfIn PDF document text
    • http://todidetiped.onlinewebshop.net/35486553843.pdfIn PDF document text
    • http://tebuwawezizafes.onlinewebshop.net/edit_text_box_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294403db-21e7-425a-a397-75d396fa174f/nikon_fg_film_camera.pdfIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_44d472c1a38f4eddb49c2ad301f9b91c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd21374-fca9-4632-a862-f3a3a353311d/are_there_good_goblins.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_off0000efa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA0 5552 bytes
SHA-256: 1224c93e58ad45088209a41410baa11ec7ce7c15013bfc71110ec36262bdbc42
font_01_sfnt_off0001029d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 10392 bytes
SHA-256: 4a11c0acb00eaf8aee337f91f554374b3594269e4de1e11e4053e5cfc17fbd94

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