Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef566034ea65dba2…

MALICIOUS

PDF

188.9 KB Created: 2022-05-03 21:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 3fb49bb3d79f07c266e864504263ebe0 SHA-1: ca71f944dd0a7c0b459db0c93cacde422f33fbfc SHA-256: ef566034ea65dba27af73ad80184b5d1a20ff6b8dabdbad5b597fdf473baec3e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains embedded JavaScript and a heuristic firing for a callback phishing lure, indicating a social engineering attempt to trick the user into contacting a malicious actor. The presence of a malicious ML classifier score and ClamAV detection further supports its malicious nature. The primary IOC is the external URI which likely leads to further malicious content or phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9466

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mifuj.co.za/XSRYdR1H?utm_term=manual+electroencefalograma+pdf++full+screen
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16205c48db0c89---75712696179.pdf
    • https://dioss.eu/files/ckfiles/file/giremewasudu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1622db3eb3147b---11142355693.pdf
    • https://stichting-pulse.nl/upload/files/99131830255.pdf
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/8996099.pdf
    • http://fioredda.com/userfiles/files/xonafavejalukaze.pdf
    • https://sisparts.pl/zdjecia/fck/file/kifaliseregoruzeb.pdf
    • https://roxomikanu.weebly.com/uploads/1/3/0/8/130873860/fesunasisuf_xebojuvotosazaj.pdf
    • https://nasabera.weebly.com/uploads/1/3/4/4/134447265/simofibimusasubak.pdf
    • https://thedinosaurmuseum.com/userfiles/files/rukikogiv.pdf
    • https://birotex.rs/images/files/wazawiladu.pdf
    • http://studiopassarotti.it/userfiles/files/tivuxalimewigosobidoxodos.pdf
    • https://unifor975.ca/userfiles/file/31176281886.pdf
    • https://nesaxelevamuzaz.weebly.com/uploads/1/3/4/9/134901400/nimopusipepu-boguwomajadij.pdf
    • http://ilink.pl/userfiles/file/zatupivoman.pdf
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/jejebozedola.pdf
    • http://www.icmtravel.net/assets/ckeditor/kcfinder/upload/files/93875540316.pdf
    • https://nojufetabug.weebly.com/uploads/1/3/4/7/134748112/tesibarejevasin.pdf
    • http://brilspa.ro/userfiles/file///40696461338.pdf
    • http://agro-vostok.ru/userfiles/file/59683541785.pdf
    • http://program-pro.ru/userfiles/files/94160544307.pdf
    • http://muratdizayn.com/panel/kcfinder/upload/files/fivomiwagivek.pdf
    • https://raxazejopife.weebly.com/uploads/1/3/5/3/135313527/8679576.pdf
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/26993698580.pdf
    • https://dewajijivixire.weebly.com/uploads/1/3/4/6/134638152/3254528.pdf
    • https://87tunghia.com/upload/file/11070596500.pdf
    • https://duabelas2gacor.com/contents/files/lomovibakemulazapesebofot.pdf
    • https://lp-tracking.com/userfiles/file/827781205.pdf
    • https://companydemo.opusviewdev.com/app/webroot/js/image/files/tuvijojumuvisuratukotefap.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002817c.bin
8e4537036f6aefe85ec14ec02a6937fa1d1dfd6ef4956e03181b807479413ab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2817C 19000 bytes
font_01_sfnt_off0002b34b.bin
6ab0a7991c7b1f0966b17a9d4784ee74daf9627ff03d2b561ecb83ab8d8e2523		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B34B 10964 bytes
font_02_sfnt_off0002cc96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC96 16792 bytes

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