Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b569c5790826beb…

MALICIOUS

PDF

79.2 KB Created: 2021-04-06 06:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b9719cab27bc410056bcbf60f4969207 SHA-1: 201a96a7a88a0285c3b4dbc57f4a7f1454cda271 SHA-256: 1b569c5790826bebd09de78065348ea87c139c710f018f1ea4aeb3371b0348eb
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external URLs, suggesting it is designed to redirect users to malicious websites. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://jacksth.ru/award?keyword=international+awards+2020+list+pdf PDF link annotation
    • http://jevetimunuz.iblogger.org/flysky_fs_i6_receiver.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/kumurovigiwuvaguti.pdfIn PDF document text
    • http://pesowulil.iblogger.org/62196295279.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxifup/PWhfhcO/train_simulator_ps4.pdfIn PDF document text
    • https://dipabuxirakilat.weebly.com/uploads/1/3/1/0/131071076/musixeb.pdfIn PDF document text
    • https://cdn.sqhk.co/takodabu/OXE7jgD/drone_air_strike_game.pdfIn PDF document text
    • https://cdn.sqhk.co/nuponoviva/Fb1Tih7/idle_factory_inc.pdfIn PDF document text
    • https://sapofekotor.weebly.com/uploads/1/3/1/6/131637774/kepuxowolafoneneli.pdfIn PDF document text
    • https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/5800d77f96b9a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nigatogozuw.rf.gd/tetupumopinugajodub.pdfIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_d3105f7b05f74f1188acd7ba047e1adc.pdf?index=trueIn PDF document text
    • http://gevukefofoferu.rf.gd/fosiguxusorixoselizeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2595c60-28fb-4144-9b3a-a8a84f5b22cb/xozewibiwegerorinewuvitel.pdfIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_98ffb63eb8dd4b08888daa46d7157319.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7168b5-3ef4-4318-804b-0f704577fa1c/44275373811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4218fec-beef-4b8f-bea8-57f5444f63b9/autocad_free_online_viewer.pdfIn PDF document text
    • http://sererira.rf.gd/bidere.pdfIn PDF document text
    • http://relogevavikidid.epizy.com/i_am_barbie_girl_song_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223e8ce0-18d7-4824-b8c2-fecabc934fc3/what_does_cradle_to_cradle_certified_mean.pdfIn PDF document text
    • http://risusod.rf.gd/vofat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e197087-ccbb-462e-bf51-e658275ee595/situational_questions_for_team_leader_interview.pdfIn PDF document text
    • https://2ac8321c-28d8-41c8-ac7a-99137a6fe030.filesusr.com/ugd/157ee0_bdad97b363da4634942ce6421408d58b.pdf?index=trueIn PDF document text
    • http://kexafobe.rf.gd/triumph_thruxton_service_manual.pdfIn PDF document text
    • http://siwupogogu.rf.gd/rogipofaxesolurogemujunen.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_off0000f4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EA 5340 bytes
SHA-256: e594c4fa9317d67f5d85fc9a518a536bac42fa46b4560411d49ff82c0da826ee
font_01_sfnt_off00010730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 11948 bytes
SHA-256: 1a7710b0ddf454a4e377a497b0d55afafda2e791a8f0fad3b8aef89e64cd8372

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