Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9644c68e180464…

MALICIOUS

PDF

80.7 KB Created: 2021-03-09 07:04:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 659ede9b687dc368d4a6c53e701c6297 SHA-1: ee0d52ada3ccda7dfb811bc5922c4aa60b72adb9 SHA-256: 9f9644c68e180464d3b746a25b3be3d00ba9dba0ae579346fcef597485ded487
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 document contains numerous embedded URLs pointing to potentially malicious or disposable domains, suggesting it functions as a lure to external resources. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the conclusion that this document is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/award?keyword=assessment+and+evaluation+module+pdf PDF link annotation
    • http://butesevoniluru.iblogger.org/big_data_analytics_basics.pdfIn PDF document text
    • http://odemebayisitrafik.com/undertale_megalovania_drum_sheet_music12s80.pdfIn PDF document text
    • http://idealicaitaly.site/how_to_program_a_dmx_512_controller4vysy.pdfIn PDF document text
    • http://merovew.xyz/751724139083729k.pdfIn PDF document text
    • https://cdn.sqhk.co/pofoxubo/jzhhqje/topps_finest_uefa_champions_league_soccer.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/bK4WggI/sumuzube.pdfIn PDF document text
    • http://4d-5d.com/resident_evil_4_walkthrough_chapter_5-_2f3gl0.pdfIn PDF document text
    • http://awpmode.com/saints_row_4_steam_servers_too_busy5oydq.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/Oidijgg/12328583966.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/3LA9ygi/53600629933.pdfIn PDF document text
    • http://xuvaguwanolinu.66ghz.com/53152780597.pdfIn PDF document text
    • https://cdn.sqhk.co/kefivaxepaj/XfuwihL/lock_screen_orientation_ipad_mini.pdfIn PDF document text
    • http://remont-pc.website/pencil_drawing_for_beginners_step_by_step_video4o1gc.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/7e8b6c40-e389-4d08-82d9-f2581f00f57f/honda_hs928_oil_capacity.pdfIn PDF document text
    • http://nanedizuli.rf.gd/zexifosikoxonexewumug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0628ecff-8448-4a94-b24b-4603b23ef245/wukelax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a2cea0-59ff-4b99-9959-48debde10096/77840623451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad496356-7671-48c1-bb51-29c32278a0ea/fafomavewigugituw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee986d8-f342-4fe9-ba05-ae34b7cc20b1/free_math_worksheets_for_6th_grade_pre_algebra.pdfIn PDF document text
    • http://pojuzuduxotazup.epizy.com/basecamp_gps_garmin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2fef13f-3652-4b05-a783-c254ba2598f5/15767762292.pdfIn PDF document text
    • http://gilebufamefaf.rf.gd/24880546759.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_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 5140 bytes
SHA-256: 252479ff4ef4a4b8e439363eecd9a26c5dbeb9566585f1ca170309f677201b1f
font_01_sfnt_off000111a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A9 10472 bytes
SHA-256: f86a62b67ad6e3ef34dfc257113b3eb28c85e0aeacccd3db2c7e394fc20557b8

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