Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f4c4d9bdec6e7f…

MALICIOUS

PDF

67.8 KB Created: 2021-09-15 19:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 13d7ca4de958ed0cd18c93b4cc204cb9 SHA-1: 19ee63fbaf98c9dc8ccd930d34b66552bbd205ca SHA-256: 69f4c4d9bdec6e7fce895170da1f4d0156355dbdbc7e4452e2995448aafd07b7
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-only document with an action trigger, designed to resemble a screenshot. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism to deliver a malicious payload. The presence of a UTM term in one URL further supports a phishing or tracking intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 0 text block(s), carries a click-outward action, and is only 67 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://irlanc.ru/uplcv?utm_term=bucks+in+fortnite PDF link annotation
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/zunulanuwol.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/zakuxerosomunagod.pdfIn PDF document text
    • http://ippon.lv/uploads/File/82386960042.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/99505788227.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/nupiluguxiwevejojefuwa.pdfIn PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa/files/kagovodenexosesav.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/5thnit94dav4fd6v2lthpoii8q/sefituw.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/43688133872.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/futejutuk.pdfIn PDF document text
    • https://drnanemilk.com/tctt/sites/aaa/file/78394705631.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/nebuzutozosazep.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/15611471108.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/nasita.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/bokojuzajogoxovefasinujep.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/fikadug.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/26585095958.pdfIn PDF document text
    • http://e-hematologica.pl/users/file/47889609526.pdfIn PDF document text
    • http://husplaza.hu/editor_up/buwajepejafa.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/76474727765.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/87097743692.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/bepetilitenuxo.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/mikiruremav.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/82341432523.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/21224650112.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/bokit.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_off0000af4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC762 10368 bytes
SHA-256: 474439745db609b738fa8f90b7332abacbb705312fd1996d87893a76e62240a8
font_02_sfnt_off0000df06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF06 14072 bytes
SHA-256: bbabbd9ecb9f912e79340f9275a0c23f748dca0cbd3767b134b1554d183766e6