Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6b171110a073dd…

MALICIOUS

PDF

70.6 KB Created: 2021-03-29 20:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7270027aa7fbb4705f09988b87cf0776 SHA-1: 570f8161d03f8ea50a63d0bf0d5d94961070e900 SHA-256: ea6b171110a073dd705123a566a858b67949784bac0b6bd42677a32263a4b520
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many of which point to disposable hosting or potentially malicious domains, suggesting it functions as a link farm or phishing lure. The presence of external URIs and the overall structure strongly suggest it is designed to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://zajinet.ru/award?keyword=abrsm+grade+5+theory+past+papers+pdf PDF link annotation
    • http://igcopyrightclient.com/74883624310rsici.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452865/normal_5fdb0c453be0e.pdfIn PDF document text
    • http://help-ruleviolation.com/hair_loss_black_bookm9m5b.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/ahdhghh/ielts_writing_task_2_essay_structure.pdfIn PDF document text
    • https://cdn.sqhk.co/zezolivexas/Ejjl6ig/t._j._hockenson_injury_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389080/normal_605448ef0310a.pdfIn PDF document text
    • http://beststudent.space/android_10_galaxy_s9_plus_verizonl0vm6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5fe9f0725873a.pdfIn PDF document text
    • http://sait-ok.ru/rulagawovaf563.pdfIn PDF document text
    • https://cdn.sqhk.co/jipodipotaj/iCjgavp/crossword_puzzle_solver_word_search.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/UA4qi0B/hamster_cage_ideas_pinterest.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448992/normal_603b3dcf2d769.pdfIn PDF document text
    • https://cdn.sqhk.co/gabunufu/kgjYhde/jikolefomomazajitiru.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/k0CEVMv/75043002069.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/ezyTdgi/wewuzilepudigaperokimowob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408197/normal_5fed8f6f063d6.pdfIn PDF document text
    • http://rte-ita.fun/itopya_ankara_magazast0a4l.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/0e9b6474-71b1-4668-9404-2e5cdbd5a4b6/how_to_find_google_classroom_quiz_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef18a0ab-3d7e-4e40-b62b-f62e58748573/what_kind_of_transmission_fluid_does_a_2007_nissan_altima_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041e28a6-1645-4280-8687-3b5664a18c53/finders_keepers_york_pa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a57e72d5-1758-460c-b48b-9e846985c4ce/cannon_safes_for_sale_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0981ef-6a96-498a-b467-9dca4d5f3b4e/mercury_9.9_outboard_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f060d1-c5c4-40db-9974-6f347e7af3f6/axis_football_2018_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efebff1c-ecde-4705-9a00-3250e36166b3/juvudot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49b62e8-a7fe-450f-8d75-f13d7efa2bb9/mozusikivoxojonotizokuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/528dce01-9722-4cc8-9e8b-c90a27681449/what_are_static_dynamic_flat_and_round_characters.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_off0000d507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD507 5780 bytes
SHA-256: 0adafb923eea340aaf6e00977e0f3d1e0d4813c8f1f4e142ddff983e021d86ba
font_01_sfnt_off0000e891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE891 10048 bytes
SHA-256: 867921ec0a9670f6aae6c95cc267ae74fa480fb580bd4a14f7921f3703e6afb1