Malicious PDF — malware analysis report

Static analysis result for SHA-256 0984beea56b6b6c2…

MALICIOUS

PDF

68.4 KB Created: 2021-10-03 12:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 013fa5f29e8d02c2eb220399b70c9a3a SHA-1: 08e41ad7a2f00f2c84ee4b4456f69c7f3169fdc8 SHA-256: 0984beea56b6b6c2f1133e1dc63a5ef2d0d39de1240206d6b9841180815a7099
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF is identified as a phishing lure due to its structure, which presents as an image-only document with a clickable action. This technique is commonly used to deceive users into navigating to malicious external links. The high number of embedded URLs and the ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 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 http://fotostudiovaccari.it/userfiles/files/mutoduxiravaberebogivi.pdf In PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/6oji1s4859idpil147gqausmv3/92040083593.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/2070281804.pdfIn PDF document text
    • https://dnsbp.com/all4help/fckuserfiles/file/43228116256.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/jiwes.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/fuvixisozenigopu.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/vuxesilodalunagavek.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/bubotepomefewixetekaduf.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/visarokisogujovinalafat.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/61315716580.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/57759246910.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/rumodunovilujaxo.pdfIn PDF document text
    • http://tochuchoinghi.org/files/38221198431.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210901211250.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/4264942409.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/janukidirivedozorud.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/rufamimifowemoj.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/sujikelelorupupilevisuj.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/161556d26cb910---nakirafavufoxubezil.pdfIn PDF document text
    • http://administratieindex.nl/images/uploads/29751875180.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/mefufo.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210920161758.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=i+want+your+love+2010+full+movie+onlinePDF 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_off0000ade1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADE1 13924 bytes
SHA-256: fe416f819daa37b85ebffda3385d08df677a9f57b39b25bc8069fcff05a5e1ad
font_01_sfnt_off0000d05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE872 10820 bytes
SHA-256: 393354afc8a838cefd0fe650f451414dff4d1341251a634fdb31f14a78d0075c