Malicious PDF — malware analysis report

Static analysis result for SHA-256 2649ca402ef624d5…

MALICIOUS

PDF

81.3 KB Created: 2021-03-23 10:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4398e0cbf17e6d4be7de2f04167fbb2a SHA-1: 2b3eacef6845d97271031ce25e04d7e3bf326fc6 SHA-256: 2649ca402ef624d5d800b587915f34513a85dce3d6f6472be60b0b73daf42cd0
186 Risk Score

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 0.9992

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://xezojetit.ru/123?utm_term=dark+souls+2+dexterity+guide PDF link annotation
    • https://gokokunebede.weebly.com/uploads/1/3/0/8/130874183/rawifonipuxumosati.pdfIn PDF document text
    • http://ashotik.space/pukoletawijabasupemurunora6dxb.pdfIn PDF document text
    • http://meetdouche.xyz/1651389092s98jf.pdfIn PDF document text
    • http://tomogorman.com/salijipumufuwado7rr6q.pdfIn PDF document text
    • http://ca-management.website/micro_brick_battle3ajh6.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/phonological_processes_age_of_suppression_asha.pdfIn PDF document text
    • http://lagejarejitog.mypressonline.com/alcalosis_metabolica_2020.pdfIn PDF document text
    • http://fridgeservice.ru/bosch_glm_80_display_problemco583.pdfIn PDF document text
    • http://wawesoja.sportsontheweb.net/rewrite_exercises_intermediate.pdfIn PDF document text
    • https://zunovuxosuseso.weebly.com/uploads/1/3/4/4/134497136/a82cdc.pdfIn PDF document text
    • http://getporte.xyz/83114086844bzoeq.pdfIn PDF document text
    • https://nipujari.weebly.com/uploads/1/3/1/3/131384055/badaguver.pdfIn PDF document text
    • http://slimitalia.space/30_day_food_challengeu0b6s.pdfIn PDF document text
    • http://tamasolesodaj.mypressonline.com/raci_matrix_project_management.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepawomokatuke.myartsonline.com/precalculus_with_limits_a_graphing_approach_7e.pdfIn PDF document text
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_a23130e1ac4f40a78d40f7d997a2fc4e.pdf?index=trueIn PDF document text
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_05177ccac5b145c4be18e3ba5596c915.pdf?index=trueIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_dd193d679e32467d8ce655558659ee03.pdf?index=trueIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_be094e86ab89494cabf4098716c5cb74.pdf?index=trueIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_a33f5aef109745c5a23cc3d766a28941.pdf?index=trueIn PDF document text
    • http://pozijawikubinun.myartsonline.com/xibibivij.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/history_of_arakan_kingdom.pdfIn PDF document text
    • http://xujided.onlinewebshop.net/86340255121.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_off0000ff0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0D 5360 bytes
SHA-256: 315a2237c63d331db1200bff2c1164f0ec6ba8e5ab96187a7a3d2119c7e3a126
font_01_sfnt_off0001116a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116A 11204 bytes
SHA-256: 313fa3a6469c4154e02e68423225ab7852f3443911fda708fa31e6fe1f42da93