Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf8e42ca7d0a3e3…

MALICIOUS

PDF

89.5 KB Created: 2021-07-20 04:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 63293cd02cb369d6d4ae6ff73c86b954 SHA-1: 400b5fdfb45a08f2d534d8e90ae4ae00209bd952 SHA-256: fbf8e42ca7d0a3e31acaaa280eb1c253791596d69661e5e98353ed9412df375d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be acting as a link farm to distribute users to potentially malicious sites, rather than containing an active exploit within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://come2menorca.com/images/file/58739639759.pdf In PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a90e859641---katijujilixel.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983554cc89a---naroruzitofazulobapo.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/wibubisirutekofelomub.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/15036214880.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/2047650494.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/xakoreb.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/vomovipixazasezugepirod.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210627030413_1916997796.pdfIn PDF document text
    • https://hgb.se/filer/file/34986536223.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/c13654ff2e7544110efbc887d45288e5/nixuwivinimexexagofa.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/c3f44566f20bb2719423af6adda27087/kakabokojoturowifamepij.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607667c01ad88---67541155078.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/41364283698.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3ko19ud3it0ms0aetsnce8ubd0/bupofilinuzupobi.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcd67aff24---jipitumusi.pdfIn PDF document text
    • http://zubrcup.by/files/files/50246490854.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/naxiluduna.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/e694d96d26cac81c2205ef931a88a556/35013298623.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/feltpcm4p0spo4oimlcfjs039q/24554822018.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/7b258ccd9b83a70e1637baf5c62f4600/70675139698.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160796160aedaa---41591637370.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/573f3824dca72302db1cb842c7e49811/jaresomuwidara.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/28193225244.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609e916006f2f---56663416286.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=streaming+the+lord+of+the+rings+1PDF link annotation
    • 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_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 10928 bytes
SHA-256: ffadc15506532f543e67389be36b818868ca873a419f02f6b95adcc2c6bf1f24
font_01_sfnt_off00011379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11379 17236 bytes
SHA-256: f952a7fc8076f9410f45e430af4d4a2e25792a7c5063ce3e13ced73646a2aebf
font_02_sfnt_off00014083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14083 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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