Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a5fdb9fad1be7d…

MALICIOUS

PDF

91.2 KB Created: 2021-08-12 14:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 57e9eebcf661ce681014daa89b488ecb SHA-1: 50d647b90190d87502e7ee52f9222787fc914f95 SHA-256: 19a5fdb9fad1be7dc2da4fca264b8e58ca7d9aa12f7d69d082866428cfef0a88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links that point to compromised websites, many of which are WordPress installations. The URLs are designed to appear as download links for popular applications, such as WhatsApp Plus, likely to trick users into downloading malware. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 https://inwebjor.ru/uplcv?utm_term=descargar+whatsapp+plus+gb+apk PDF link annotation
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160755e5537b20---xarogutodep.pdfIn PDF document text
    • https://bliznacite.com/files/rorogalowuzukazis.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f6dc9584d---luxexiwikadegujik.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/losotezutanujub.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/39097744798.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/7c7d877b36b4afb04bca688645436419/xuwosaxiviwuverokik.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f17533135f---97561080143.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab9a0abf78---tolodamejuzewefuramo.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/8a35686560385a07072cb57ee166f44a/joxexasase.pdfIn PDF document text
    • http://yongqingtech.com/d/files/42951793159.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8517d3484c---29205993120.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/99391330311.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/gisoxazadeferifogonowiru.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f00ffd7256---32109919379.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e88e36a2ca---naxivuritisafovewiwubir.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16086e0e90cb26---72876683258.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/ee25b93ecc193f9e7ad98dc84578de12/lidod.pdfIn PDF document text
    • http://yuha.be/_files/file/77123880311.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/70794e5713c06293acf3741bd4309d2b/mavafizetijumelo.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/s1sqvjie7rblcv0q0ksad813rs/58533650644.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/gerugqq78kl2aamfht4rshbvb2/pabobelogarirafi.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/4192bde223ad91982979dba7bdfd1c79/dobapobikukaxavutinar.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16081593ce233a---69402612024.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/nosuxidojekumi.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_off0000fc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 10756 bytes
SHA-256: d78a6a4150be1523f384ecc10d54f0fb94bf3812277b33c31c4cbbd37d85f499
font_01_sfnt_off00011526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11526 18956 bytes
SHA-256: 1f08c408a5680e1484746de509dc4cdce274373671b2874ef027f64d8ab8ba60
font_02_sfnt_off0001451f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1451F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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