Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c940e37d67a944…

MALICIOUS

PDF

104.0 KB Created: 2021-04-05 03:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07b2ef7f344083d5e517fc0578fe3ecd SHA-1: 5ccc7bdd4fe629665ae8e1a7436990c9f33118ef SHA-256: 11c940e37d67a9444caa5299829c7d7813db8c81be8c2779c079a3b7564e8be0
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=marbury+v+madison+summary+of+facts
    • https://fiwigerisen.weebly.com/uploads/1/3/1/4/131408459/3814709.pdf
    • http://rotukefune.getenjoyment.net/mopobo.pdf
    • http://salufogi.iblogger.org/36282877336.pdf
    • https://dazutexigamufo.weebly.com/uploads/1/3/2/7/132740900/3951099.pdf
    • https://lenumerizak.weebly.com/uploads/1/3/5/9/135962539/fusuximero.pdf
    • https://besugadofozoxi.weebly.com/uploads/1/3/5/3/135396803/fa16c.pdf
    • https://dagaroxir.weebly.com/uploads/1/3/5/9/135973008/niponajilibumebe.pdf
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/tusefalurij.pdf
    • https://xaverawigidun.weebly.com/uploads/1/3/4/4/134437914/8485378.pdf
    • http://lebuvowune.getenjoyment.net/biopsychology_pinel_free_download.pdf
    • http://zipafaxelati.sportsontheweb.net/rogue_trader_the_koronus_bestiary_download.pdf
    • https://supuzuvafexag.weebly.com/uploads/1/3/5/3/135383103/bulaxujutigivovek.pdf
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/5901699.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xijalovelokolep/dd_5_players_handbook_download.pdf
    • http://zumewozuzetarun.epizy.com/beatles_karaoke_songs_free.pdf
    • https://s3.amazonaws.com/saziwijaxodav/edit_file_free_full_version.pdf
    • http://diwadakerinepix.myartsonline.com/81018416291.pdf
    • http://wimoduwogukuruk.rf.gd/zebapewolexonidiza.pdf
    • http://putojoner.rf.gd/lagifetin.pdf
    • http://belibivizonojo.myartsonline.com/suwunusetopapidimuza.pdf
    • http://givorajosi.rf.gd/free_club_flyer_vector_templates.pdf
    • http://jukikusikodopom.epizy.com/java_offline_windows.pdf
    • http://gudoxigamodire.rf.gd/facebook_for_pc_windows.pdf
    • http://nepejalaziba.rf.gd/erico_cadweld.pdf
    • http://menimilerawapo.rf.gd/hungry_shark_world_hile_apk_indir.pdf
    • http://zukolokemegizut.rf.gd/59697329791.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015972.bin
fccf8cce7b78c6efdb2d49d1c37ec57b7162c23d2f6f9f45311fe296431349fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15972 5444 bytes
font_01_sfnt_off00016bf8.bin
495318b426c124c2f9b97288230e1b5d4db9388a29af9ea0ce2c56579ed18478		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16BF8 11284 bytes

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