Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3e199f3b002741…

MALICIOUS

PDF

68.9 KB Created: 2021-09-29 05:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ba75942477e50ecb1cb4746cea98d473 SHA-1: 06c2a6d394c88d4db4101fd4fbdbf8d2fe652e93 SHA-256: ab3e199f3b00274172e4b0d7d00e5c21e02127d31e6b5ac39026c8cc8b90dfa9
86 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, specifically an image-only document designed to trick users into clicking an embedded link. The heuristic 'PDF_IMAGE_LURE' indicates a screenshot lure, and multiple external URIs were extracted, suggesting a redirection to malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://wastran.ru/uplcv?utm_term=teamspeak+download+free+android PDF link annotation
    • https://fong-cai.com/upload/files/fexakeremodemitixekesi.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/kimevarakupitan.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/dosaton.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/kirafotoda.pdfIn PDF document text
    • http://nhasachthunam.com/upload/files/xewusimilozalebusedijinew.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/timaz.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/75979701991.pdfIn PDF document text
    • http://satyamtracparts.com/userfiles/file/16860482700.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec0a46d6da---venaterijatikoxakivanakeg.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613155cb2b1ea---44017884351.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/88388204331.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/26256887029.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/nufiwabopugoma.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/15994677858.pdfIn PDF document text
    • http://alacarte-husum.de/userfiles/file/66630407161.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/202191083582505.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/pabusakifobuk.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/voxutalavosudonoret.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/majuxuzawimepup.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/478539669.pdfIn PDF document text
    • https://artedelvalle.cl/gal/files/file/21159513122.pdfIn PDF document text
    • https://termoformat.md/img/files/julaxopif.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/93886461549.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210907110350.pdfIn PDF document text
    • http://unitez.net/images/newtech/files/voleb.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_off0000b2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D5 13840 bytes
SHA-256: 6d013cc6d28a99c4517497ed737b629059f491e50d84e9b62161cc108e193ee6
font_01_sfnt_off0000d54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 10700 bytes
SHA-256: a72b9b9225099356f160942ccb9c4a141f21dc80308370dcab492f631346fc7b