Malicious PDF — malware analysis report

Static analysis result for SHA-256 7949154c34fc58a7…

MALICIOUS

PDF

82.3 KB Created: 2021-03-08 14:16:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c2b38fb6e213bb7dc3bfb9ed11cfced5 SHA-1: d5acf635cd80239a02c48a57ed81c79a0a19a9e1 SHA-256: 7949154c34fc58a719aa874dfd50351ab04543ba119720aacf135672956a200b
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, suggesting a link farm designed to redirect users to malicious content, likely disguised as a user manual. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to exploit users through deceptive content and redirection.

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://nipisod.ru/strik?utm_term=oster+bread+maker+5858+user+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501509/normal_6017b2cda9382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495558/normal_602fe32ca9ffa.pdfIn PDF document text
    • http://ipatovaalena.ru/what_is_the_role_of_an_eye_in_handmaids_taleefup2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5fe64ab99b006.pdfIn PDF document text
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/jotekevivarurujod.pdfIn PDF document text
    • https://kazuvamelu.weebly.com/uploads/1/3/0/7/130738637/mejoliladojum_jubofemibuju_fabadutekizako_wakedapaluwixis.pdfIn PDF document text
    • https://witaretazijaw.weebly.com/uploads/1/3/0/8/130813730/3980759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470537/normal_603cefe096320.pdfIn PDF document text
    • http://theraisins.pro/babushan_video_songuhqdv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_603f622e85b47.pdfIn PDF document text
    • https://namobilezivi.weebly.com/uploads/1/3/1/8/131857476/c5cf6fe3f0.pdfIn PDF document text
    • https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/dudujaxako.pdfIn PDF document text
    • http://cocobuka3.xyz/girl_next_door_saving_jane_taylor_swiftf9owt.pdfIn PDF document text
    • http://idealicaitalia.website/lezuve9caiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuronixo.rf.gd/72543051353.pdfIn PDF document text
    • http://vuvazapej.rf.gd/behringer_xenyx_2442fx_power_supply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f14c8bc3-2530-4116-9415-a7bdfb6662a2/nasm_essentials_of_corrective_exercise_training_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/15260105663.pdfIn PDF document text
    • http://zuwukab.rf.gd/how_to_put_together_ikea_kallax_bookshelf.pdfIn PDF document text
    • http://fatijilipoto.epizy.com/disney_world_park_times_february_2020.pdfIn PDF document text
    • http://purubonosarule.rf.gd/navvuthu_bathakalira_video_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33721176-f77a-43dc-bbe2-931f41fffa6b/14127498162.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/84644336736.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/37935356054.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/xanathar_s_guide_to_everything_druid_spells.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_off000100f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F2 5520 bytes
SHA-256: 6d57529617da5907c2cce0265d156297a598f60bdb8a34506a14a4400225367d
font_01_sfnt_off0001139c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139C 11528 bytes
SHA-256: f7bb7a5142ba08ac417470a6a838a5ea105dfcaee35610b13f0c5fdbbb54d9af