Malicious PDF — malware analysis report

Static analysis result for SHA-256 e892ddf6c36dc5bb…

MALICIOUS

PDF

68.2 KB Created: 2021-09-30 13:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 241050ccad99e3c069917823ab076688 SHA-1: 0e2dcee9bd1492ee6eb336eab70603dde3b78d08 SHA-256: e892ddf6c36dc5bb89878f66035e619b699401b9c7ebe15b9159b8502d2ed398
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is an image-only PDF designed as a lure, containing a clickable link that redirects to a URL associated with phishing. The PDF_IMAGE_LURE heuristic indicates a typical phishing shape, and the ML classifier strongly flagged it as malicious. The embedded URLs and the structure suggest an attempt to redirect the user to a malicious site for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 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://inwebjor.ru/uplcv?utm_term=watch+aladdin+2019+full+movie PDF link annotation
    • http://mwcapital.net/ckfinder/userfiles/files/xuduwaxuluxemuvo.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/31321147014.pdfIn PDF document text
    • http://rem-proekt.com/f/file/77172312095.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/63540214314.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/60985030374.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/wesomolejilukafoporonip.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/nazokukujumogek.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/fepixupodakifunamiveli.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/30062493.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/zuxagijufasamakakakuw.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/3693240207.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/morilulatililejatuvetosoj.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/zanuvudamagiderigulaga.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/lareluvomuwogatosuxoloke.pdfIn PDF document text
    • http://proficlim.ru/public/userfiles/file/64780685907.pdfIn PDF document text
    • https://foursservices.com/nbloom/fckuploads/file/xazutewaje.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/4999935541.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/48812599144.pdfIn PDF document text
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/93700299467.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/29100390986.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-19/20210919231718947086.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/560d95a296f5aeef6f7486cbbc861cb9/33243413956.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/12350637794.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_off0000adc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D2 14500 bytes
SHA-256: bbab7e084e28a74d81ab617a9dadbf8b076c9dba9fc2d7026a601eecfc0b025f
font_02_sfnt_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 11092 bytes
SHA-256: cd546ca3b24bec6b9d581e251b5c634bec1d90d0c24681ee7c1e9611b79e345e