Malicious PDF — malware analysis report

Static analysis result for SHA-256 2035b70a73ec328f…

MALICIOUS

PDF

68.3 KB Created: 2021-10-04 00:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: edefc374110e2436ff12b2d77e50af7a SHA-1: 056e0aa2ac144280b5071441bebf2b2827daa229 SHA-256: 2035b70a73ec328f64cd75f05c4bc1d881a2fa3dd49dc444607360b95ad7b991
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with a click-outward action and a small file size. It contains numerous links pointing to external domains, many of which appear to be compromised WordPress upload directories or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to a malicious site for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://philabc.ru/uplcv?utm_term=best+of+taaooma+comedy PDF link annotation
    • http://dotbamboo.com/file_media/file_image/file/50689966156.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/bifobikaxexox.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/penozogotuxeserog.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/10810580007.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/d9b7b9ad978730c206316bc224eacc16/70655463240.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/tebelewi.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/4k3klk3eqv79r5jlnk8a072b43/13151212319.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/66906987590.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210905150910_828041423.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/jadegelulu.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/besigimoribiwu.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/papemunitiwepimuwotezuw.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/68343397390.pdfIn PDF document text
    • http://jaqalsports.com/files/file/betatanotidekumekexijaza.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/82447572529.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/17969978875.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161514614cd857---riwalokamivifipijepufu.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/2aft88h474dov3hm5pinek1fo2/17271633032.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/botanipobu.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/jagafuxadoza.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-6/20210906050642910985.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_off0000af2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC742 10460 bytes
SHA-256: a3ed6a1a0a4d6e4fd743bde226263ad8b236e1e4e10fcb29414e082c9843b528
font_02_sfnt_off0000df2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2D 13952 bytes
SHA-256: 405fc340c4923c5f3bb44fdb056fddd1de82cddb970d0d8e2424a3be5bf3f2bb

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