Malicious PDF — malware analysis report

Static analysis result for SHA-256 446459c3283fa690…

MALICIOUS

PDF

68.5 KB Created: 2021-09-25 08:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2cc77a61e628b481d3a1817bf12ffa12 SHA-1: 5216fcb189d5d8e58701bac68b6b0dd7aee76188 SHA-256: 446459c3283fa6902c75141726fcb9a3432f5b8fd40a7876f8d8bce1789e02ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and potentially compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://archism.ru/uplcv?utm_term=hack+neighbours+wifi PDF link annotation
    • http://aliceinformaticasrl.com/user/pages/10084130462.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/mokefuwilokizodebitil.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210903_79E2E81CEADF12AC.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/tapifavigevevu.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/9905467822.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/lajaw.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/91784233989.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/44620838001.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/jejeluxexu.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16132e0afe197b---nazupolipufo.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/mepowetatuxovatex.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0c97c94b4b688e2e25b4274e01f27f51/zipojujilila.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/23207984169.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/52908857624.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/83759981596.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/6332786189.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/22681700130.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/7f557698619d08d1699efe196fdb9c70/vilotunemudosixob.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/nuvedajufabag.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/18712971698.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/17890695563.pdfIn PDF document text
    • https://immobiliareincentro.it/allegati/file/43784527804.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/46744543606.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/78889654438.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_off0000aec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC9 10880 bytes
SHA-256: 191e61446b8bdedc141772b49029f5fedafb4cfa1859b2fd3b634cbd87286e0d
font_01_sfnt_off0000c7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFA 14736 bytes
SHA-256: ce5a25a09efb48d7f15a48021b38935195f07001ba10311951a0eeea23781a2a