Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df7e7a877243269…

MALICIOUS

PDF

67.7 KB Created: 2021-10-05 01:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b727e93d6722b8fb74de5fa36bf8e795 SHA-1: 06b504ee96f72698decc77800476036c432c0284 SHA-256: 7df7e7a877243269d1a454118986408a82b06153d8a058426a96b59419d47653
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-only interface with a clickable action, typical for directing users to malicious websites. Multiple URLs were extracted, suggesting a link farm or redirection mechanism to host malicious content.

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 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://huntic.ru/uplcv?utm_term=conjugating+re+verbs+in+french PDF link annotation
    • https://buzascsaba.hu/userFiles/file/fefowom.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/nilibakovurowetezutek.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/93381133014.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/85002957018.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/lujidawusakuv.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/vawuzagebegiwepowug.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/tujerisumuto.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/wabiridaroz.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/61481cf2cf5e3.pdfIn PDF document text
    • http://mastervin.ru/files/file/lewogujetetetenaloj.pdfIn PDF document text
    • http://chapelguild.com/images/usr/loxuxerizax.pdfIn PDF document text
    • http://www.lbtfilm.com/uploads/files/xozuxuf.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/tinejif.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/paxeropovogipeva.pdfIn PDF document text
    • http://espressobuilders.com/app/webroot/files/userfiles/files/85406154018.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/fonesobelajakikabobi.pdfIn PDF document text
    • http://pachinkoevent.com/sites/default/files/file/58652593625.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/ginajo.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/zujevakemowoxabopuv.pdfIn PDF document text
    • https://congnghiepxd204.vn/upload/files/vatudodutemere.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/159786525561331fa241f5a.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/75888955323.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/pedijerimitosalar.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_off0000ada5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BC 11036 bytes
SHA-256: 4b9f6260b0d03043c82941d89a49eb7803262f3157e19b7eea6283993876de90
font_02_sfnt_off0000df6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6A 13920 bytes
SHA-256: 964e5e12a41da799ca05c6512db13deeca146e3bf735c4127644faedfdc9cd78

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