Malicious PDF — malware analysis report

Static analysis result for SHA-256 68119f8a5e159b6e…

MALICIOUS

PDF

83.2 KB Created: 2021-03-20 23:15:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3deeab74d478780892e4dbaa2dddbbff SHA-1: 7630a3a1579bce133c57f109452e3d03c992fab6 SHA-256: 68119f8a5e159b6ea98c5b4984e9e99be9b3fc2e55fcb7e35816da0ede67b6c2
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

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://lozipotod.ru/strik?utm_term=10+verbos+regulares+e+irregulares+en+ingles+con+su+significado PDF link annotation
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/kopuvinetunef.pdfIn PDF document text
    • http://sokolov.fun/642841219438qk2i.pdfIn PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/3635228.pdfIn PDF document text
    • https://sazulolako.weebly.com/uploads/1/3/1/4/131453808/98e3ff3a306ad3b.pdfIn PDF document text
    • https://cdn.sqhk.co/ronelejibir/WJ9hgVn/92431845273.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/6xAibij/25905564498.pdfIn PDF document text
    • https://xebuzoxovekig.weebly.com/uploads/1/3/4/0/134018553/zupomavukile.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/Die6Ogg/party_city_balloons_30th_birthday.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/gjA4idz/fozodovu.pdfIn PDF document text
    • https://cdn.sqhk.co/joxezexukub/gjgeshh/stickman_battle_2020_stick_fight_war.pdfIn PDF document text
    • http://myfavoritesun.xyz/bilasexubowisidog2kly.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/afc9a617-6d2e-43e6-a15f-5f7ad03da5f0/how_to_become_a_vet_care_assistant_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/bofunep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba55586-49ba-473c-a0b6-efc3ddfad3b5/pilot_light_on_gas_fireplace_is_loud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f23f6b6-e042-4aa2-b8b4-b15514f29f37/group_theory_chemistry_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/avg_tuneup_2017_full_version_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e306e52-8d61-4233-b379-8c07dbd5ac46/wonder_woman_warrior_tattoo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa0eb87f-ba5b-4ad3-9cfa-5e1fa1360673/tokyo_ghoul_series_list_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d8a6af1-1cc4-4bc9-a54d-2da361ddeebf/tesalabotutanabitisagu.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/47885411670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9990e5c5-b625-407d-9915-0b5ffd1a60ff/how_do_i_program_a_rca_universal_remote_to_my_roku_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/64986884197.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_off000104fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FC 5488 bytes
SHA-256: d1129928aafcab6389434be2b49550174d5b79625cf09a6cf3ef2f1a0b01f792
font_01_sfnt_off000117be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BE 11416 bytes
SHA-256: a200f2d3116161c0785e786d6137005e5f2714fa1ef73b3c20813f78538177ca

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