Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4349ecc99e7d924…

MALICIOUS

PDF

80.9 KB Created: 2021-05-03 03:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b2cbfd262e29dd0a63bf63ade86305de SHA-1: aba00e30f11d2aa7e431f7ce829dfffe3f7c85e7 SHA-256: b4349ecc99e7d924198a024918a3debc734d0d799fc586c615c2715659ee9a50
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing campaign. The document body is heavily obfuscated, but the presence of external URIs and the overall heuristic profile indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=sccm+client+installation+log+location PDF link annotation
    • https://gazumewus.weebly.com/uploads/1/3/4/9/134901575/7158091.pdfIn PDF document text
    • https://gitasojozatoj.weebly.com/uploads/1/3/0/9/130968906/d9906966f.pdfIn PDF document text
    • http://xtreme-sport.ru/vepibovabomazometabt0bl.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/tuburorutagenazukovert31a7.pdfIn PDF document text
    • http://remastacer.com/19904319161uq60y.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://shoop-ft.ru/pixamemuwedujozidibeni4mwou.pdfIn PDF document text
    • http://itawegan.space/muwujofanipowivet0tbdb.pdfIn PDF document text
    • http://geekcods.com/55004772371fizh7.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/0076b555-92d2-4c9c-85cd-912f99a7e184/excel_2013_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5e8eec-8378-4d9d-ba22-15e0d3ea185c/imax_b6ac_80w_6a_updated_balance_charger_discharge.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/molarity_and_molality_practice_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/479288f9-f6da-4c45-b43f-ad20d1dbab3f/how_to_get_free_fortnite_codes_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071f1e00-22bb-4cc0-aaea-244616333074/29439774984.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/the_misfit_of_demon_king_academy_season_2_episode_1.pdfIn PDF document text
    • https://3c31dc6e-14a3-4e60-a373-897e90814001.filesusr.com/ugd/9e17d8_46711493da5e499d88d996c883ad3809.pdf?index=trueIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_ce4789d06dcd4abe81bc6b284e343423.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/68340820514.pdfIn PDF document text
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_da5b75c8553d4c1ea174cf4f075db688.pdf?index=trueIn 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_off0000fc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC34 5128 bytes
SHA-256: 16795236a6488bcfc1a8d99ad5d3993851fcf8577948b585b2b5b43d266c77b3
font_01_sfnt_off00010d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 11892 bytes
SHA-256: 142e28247a91818508505b8c34970d8a9ae9adda79b9552b20e335602a0f09ec

Open this report in the interactive analyzer, or submit your own file for analysis.