Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d82277fa653183…

MALICIOUS

PDF

86.9 KB Created: 2021-06-10 22:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f9641a55ba3ad257e91d924178cad940 SHA-1: a824c4e154a77f0762bf3674d979379674aa5558 SHA-256: d6d82277fa653183d05dd3086a7670c523cd7e92cc8f336f75c30b666092b49b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting services, which is characteristic of a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure suggest it's part of a phishing or malware distribution campaign.

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://coretry.ru/pbw?utm_term=cbro+skins+value PDF link annotation
    • https://tobalewaluwe.weebly.com/uploads/1/3/4/4/134437424/laladuw_dafejubujep_zakekakapim_kozajafibafo.pdfIn PDF document text
    • https://sufogewanogona.weebly.com/uploads/1/3/1/0/131070160/zudetaguxofokurojo.pdfIn PDF document text
    • https://gufagopa.weebly.com/uploads/1/3/4/6/134660265/lejisadabami.pdfIn PDF document text
    • https://supagerafigi.weebly.com/uploads/1/3/0/8/130874211/gowiwij-lurerusikubudu-fajevafofa.pdfIn PDF document text
    • https://malojedatev.weebly.com/uploads/1/3/0/8/130813840/3923958.pdfIn PDF document text
    • https://berigagagek.weebly.com/uploads/1/3/1/3/131384675/netekavofuto_wizemelit_vewufikumeketod.pdfIn PDF document text
    • https://sekugarotapoze.weebly.com/uploads/1/3/4/3/134362520/zetekok.pdfIn PDF document text
    • https://wifusudufasebo.weebly.com/uploads/1/3/5/9/135992472/6878517.pdfIn PDF document text
    • https://fedufifor.weebly.com/uploads/1/3/4/8/134894833/vawan-naravexogotiti-kutogofekubavex-dojajivasomo.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/15e7aea6-0abd-47fc-ba4d-723d4ff8ee74/73469714711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afbd7fd4-8ea3-4cab-af6b-ae582c094773/40643694728.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/w/file/fetch/144697665/physics_displacement_vs_distance_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5f24b99-e63e-45df-bb79-bbc4ec5d388c/kadenazejojud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/677ac490-afb8-49aa-a97d-087ad56614e2/90384336239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7663a233-9f78-43a3-afe0-6ce88b422bcb/nezizux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbf5228b-e243-4fb3-b0c8-cf477786cc97/53634146236.pdfIn PDF document text
    • http://pevozowo.pbworks.com/f/ronevuxamejumesuzage.pdfIn PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144651318/what_is_the_best_therapy_for_major_depressive_disorder.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A16 3060 bytes
SHA-256: 9d5232c7345ea37616362868c27e7e8cab915c1ae3bc26b6513d27a8e4cf592e
font_01_sfnt_off0001150b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150B 4848 bytes
SHA-256: fadfe8e7aa509d7095eb5204f4ec91dbfa1d332fb0d87e6a5c3ef7724ce5a794
font_02_sfnt_off00012595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12595 12072 bytes
SHA-256: 373e80f93cbdcb2e0fd2b6758dea5de0caec9cccb4256adcdd6a193ce562fe73

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