Malicious PDF — malware analysis report

Static analysis result for SHA-256 39df26cc0585829a…

MALICIOUS

PDF

97.7 KB Created: 2021-03-20 23:12:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8ff143ab801cdede52f157f59191500a SHA-1: 5b1357d26dc32d9545e7aace8531956d186acf10 SHA-256: 39df26cc0585829afd371f5134c5902569f6693ca3d4714b27c921acc80b9d58
146 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. It uses a callback-phone (TOAD) lure. 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 0.9987

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://vilenefex.ru/aws?utm_term=belt+routing+john+deere+l110+drive+belt+diagram PDF link annotation
    • http://copyrightshelpscenters.com/nunuvotinuxevirixivezikio7ony.pdfIn PDF document text
    • http://naturmilans.fun/relujuzuwipojupimufojafijrlyt1.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/Bjjiegf/football_legend_dies.pdfIn PDF document text
    • http://fbcopyright-center.com/goanimate_for_schools_character_creatoritx7l.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/ejcgjeQ/wedding_makeup_salon_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/fyn13pX/space_shooter_mod_apk_unlimited_gems.pdfIn PDF document text
    • http://zzzmmmmejjj.space/ford_mustang_gt_horsepower_by_yeareyicc.pdfIn PDF document text
    • http://nawogevimogagu.22web.org/fimepobelegetoxujatoje.pdfIn PDF document text
    • http://thedouche.xyz/irobot_roomba_i4_vs_i8z4v9d.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/cvIShvf/24532799315.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4582ce02-dd31-4070-a22f-fe46c8326413/blomberg_dishwasher_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b896c4-3842-44c3-9bf8-6b09340c16af/zokulevepugonas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4872cb2-8a54-42a9-8147-b7f7698dcd03/28681821717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5de27a28-7181-4183-9904-8a1190c4eae8/wajapomebililarimuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e78f69-ac2c-4a47-8512-60c5e1fc17b2/78063947855.pdfIn PDF document text
    • http://podapuleleg.epizy.com/wulesagonuvesikabib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b20504f-d4ca-4745-acd3-3097e4711753/pudos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1912db9-77fc-4b75-a4c7-76184d9c8ded/how_to_use_an_ab_lounge_sport.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba4d3e8b-2e70-40b9-96da-8ac3017485d0/pumetufipaxakot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1959fb7c-70fd-457c-a64c-951c8d0a4e5e/brother_drum_error_green_tab.pdfIn PDF document text
    • http://xidafugifux.rf.gd/midetobas.pdfIn PDF document text
    • http://jozapatoxijoraw.epizy.com/age_of_empires_2_no_cd_download.pdfIn PDF document text
    • http://bosadubarelazu.rf.gd/an_inspector_calls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9ae7874-09ec-4354-9823-f9d64fcf8b8f/the_emancipated_spectator_artforum.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_off0001311b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311B 5460 bytes
SHA-256: 15bc706fdfab34d3dbfdb521a40873f525d62105df6712cd839acd84caab06b5
font_01_sfnt_off0001438e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1438E 11540 bytes
SHA-256: bc35d7fa1a44c090386f6cd16f3a9dac3755cb7b260d54cd02d3f0439b6fa771
font_02_sfnt_off00016ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AD0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333