Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5e670e92cff1d3…

MALICIOUS

PDF

71.0 KB Created: 2021-09-20 22:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ca086837c1cda1b1c4924f54d4d91332 SHA-1: ff41aa46e901d2e8e0e539fe80504e8b8fe7a9fe SHA-256: be5e670e92cff1d345ffef27223811fcc7d604c1637e7f08ab3830aae5243067
146 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://josquin-capella.de/download/puwudaxatonalesexunax.pdf In PDF document text
    • http://dansungsala.com/uploads/files/fibuxedonusatoba.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/gutasosifus.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210903162930.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/89457975457.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/51235805760.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///nujubixa.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/53530347099.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/86333599670.pdfIn PDF document text
    • http://gestioniarmatoriali.it/27119838707.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/nigoxodurajuvudikum.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/luduwidubogarukefozegosaw.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613000f07ddb1---lefog.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/gokomiputumugamuxokenos.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/pigesasa.pdfIn PDF document text
    • http://bajkolandia-leszno.pl/userfiles/file/xuvenapudowuneso.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/gifegoxen.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/tavevudivox.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/wegalaget.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=best+backup+and+restore+app+for+androidPDF 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_off0000b4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE0 10952 bytes
SHA-256: 84dc63153f7a7a2e67f9819bbaa05b88ad82f3c67b265cda91827b3e2492a9da
font_02_sfnt_off0000e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63C 15964 bytes
SHA-256: 51c03f97ec0c6a8cfb352fb428e5c267905050858e585be326a888d8ace6ae59

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