Malicious PDF — malware analysis report

Static analysis result for SHA-256 92786598c9d5ad4e…

MALICIOUS

PDF

75.8 KB Created: 2021-09-07 15:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9783152ed6b4bbe2d52e9f1b8e5135db SHA-1: 51a4d02af32c6d8f62e4ee4507408e5656ad199f SHA-256: 92786598c9d5ad4e7835059590505f7ce46f883654fa51a9d04b8759f4c0b5ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://irlanc.ru/uplcv?utm_term=nabakallol+patrika+pdf PDF link annotation
    • http://dataprint.ie/uploads/file/sujezudesemorazir.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128d400aefe9---furokapunosowavug.pdfIn PDF document text
    • https://chptravel.ir/data/file/64908684529.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/9c1f50d79ba90712c6256548835e9c38/86001251996.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/da698ce25e59c0965a8fd26f5e4f355c/navinukipuvarovabapobudib.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613343c842873---21843776521.pdfIn PDF document text
    • http://df-foundry.net/d/files/86597317026.pdfIn PDF document text
    • http://aqcons.vn/upload/files/gelanonuriselodorufil.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/wofomajej.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/dd0b484aa38b83573ac49536113fde73/77713952178.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/likurubekokefip.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/nobejitidozo.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/xewujominapawixexetab.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/fodaza.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/vavijubunizevolo.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/60030839546.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/857c57fa44275386873d54167c35f123/ronofol.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/litapowewamugiduwufiv.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/buvaluzebejod.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/22498516221.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/wedurepo.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3f97885e1---sexikatetixufo.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/3h7rnoq3cn5ihsksqf00gtk2k7/vabiremifez.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC0 18880 bytes
SHA-256: 6d11a248f32f8ab71bb97d9ced67567fb27aebb1554c14bbefab51dbb69af12a
font_01_sfnt_off0000f0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 10296 bytes
SHA-256: 7f0e8dbe6d6d29a0965b6ffafd731bce7112aeb70bc39fab8959b0873827519a
font_02_sfnt_off000107f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.