Malicious PDF — malware analysis report

Static analysis result for SHA-256 39848abd8a150715…

MALICIOUS

PDF

78.6 KB Created: 2021-05-14 04:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 495f6985eb2b1b123f158f968738a4a5 SHA-1: d8c9b01350c68992ba8d3cd4acf1c44e5e8ed615 SHA-256: 39848abd8a1507153c06700dd9052015d03b2b682a7bc8ed324267ed80663317
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 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=best+forex+scalper+ea PDF link annotation
    • https://cdn.sqhk.co/vumusokutil/zie3Pgc/pound_cake_recipes_using_yellow_cake_mix.pdfIn PDF document text
    • https://lifulufo.weebly.com/uploads/1/3/1/3/131379971/zexokoxape_gigejupudires.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/ihhiuY5/amazon_music_download_pc_windows.pdfIn PDF document text
    • https://kamararexunazo.weebly.com/uploads/1/3/1/4/131453861/ca281234.pdfIn PDF document text
    • http://linorusani.iblogger.org/ajax_post_form_data_to_controller.pdfIn PDF document text
    • http://dimoguzix.iblogger.org/79379375802.pdfIn PDF document text
    • https://cdn.sqhk.co/tesuvifiv/yigifLK/ticket_to_ride_london_game_rules.pdfIn PDF document text
    • https://rinejadujasale.weebly.com/uploads/1/3/0/7/130775071/ea21a79ed.pdfIn PDF document text
    • https://bizegesozuno.weebly.com/uploads/1/3/3/9/133997168/a3796a71416ba99.pdfIn PDF document text
    • https://cdn.sqhk.co/josutupamav/giJgyxa/world_war_ii_combatants_list.pdfIn PDF document text
    • https://cdn.sqhk.co/xasomegupur/iwIjfif/83207264434.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/fb0f61c1-f0e9-4a69-91c1-bd04fb16f4d9/61607319753.pdfIn PDF document text
    • https://5c126656-fc4f-473b-8c99-11744d2e1b96.filesusr.com/ugd/abd8ec_60392a9b26d5445fa1a729183c031358.pdf?index=trueIn PDF document text
    • http://pevofezufus.rf.gd/bls_test_questions_and_answers.pdfIn PDF document text
    • http://sokurunofizune.rf.gd/44912644601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7cd1bd-9be5-4e2b-98fe-e2e81c8bb38b/97895107002.pdfIn PDF document text
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_dbdf5fd787084c1c81e770e11d8746c9.pdf?index=trueIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_22231a88b2344081abb2213159169731.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd9802e0-f016-4447-a6ac-3a12f82ed075/kivopapoba.pdfIn PDF document text
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_9e37afa2ea47453eb7034801d7deda37.pdf?index=trueIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_c353f20591da4f198285055fea835355.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c5d047-fd4c-42e0-97da-557712d73b99/30873780413.pdfIn PDF document text
    • http://rowomikaxanuga.rf.gd/vipekatemuzuseve.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_off0000f571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF571 5128 bytes
SHA-256: ac59e3059c371bfe7cb27d1d62c3754d50547de77b131d02a08c7fca9dcaac80
font_01_sfnt_off000106fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FD 11232 bytes
SHA-256: fba6952bf103928724ab3b02616dc409becea2a7fd09a3733b0ea454cefe92ea