Malicious PDF — malware analysis report

Static analysis result for SHA-256 f468d3ed729a01c9…

MALICIOUS

PDF

69.4 KB Created: 2021-09-24 21:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7eb388e74389ad523846ccb4c87b1c71 SHA-1: 32a4fe86ccb2caaf8620d420d7c0416e84bfc63e SHA-256: f468d3ed729a01c947c69431fac16ddfe4c2c6a93053ddacd6dee87aa79f5bbf
146 Risk Score

Malware Insights

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

The PDF was identified as malicious by a machine learning classifier and ClamAV, exhibiting characteristics of a phishing lure. Heuristics indicate it's an image-only document with a click-outward action, typical for directing users to malicious links. The document body is heavily obfuscated, but the presence of numerous embedded URLs, many on disposable domains, reinforces the phishing or malware distribution intent.

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 1 text block(s), carries a click-outward action, and is only 69 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://maintogelonline.info/contents/files/33504448217.pdf In PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/65925168461.pdfIn PDF document text
    • http://diennuocdanang.com/uploads/image/files/padudipalaf.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cbef960197---15632333804.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/misutulibebaku.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/69165426078.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/11406087288.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/78151122555.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/bitada.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/4v64crhiufalr1fgvhvr5v3rf6/89973338630.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/dovotasedafefugim.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/91856138803.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/jemidemanuvus.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/15795758516.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/jaxubutuwukenal.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16148203de0510---69326319936.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/68576131150.pdfIn PDF document text
    • http://aztkgbv.love-mrt.com/upload/files/65523211087.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/73466291477.pdfIn PDF document text
    • http://knuhpharm.kr/userfiles/file/20210923102623.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/5353121892.pdfIn PDF document text
    • http://www.ap-arte.ro/fckupload/file/2329124223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=door+slammers+2+unlimited+money+and+gold+apkPDF 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_off0000b0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EC 11164 bytes
SHA-256: d9abd750040415d185102722421b57187c2ffa233b107846b83e24937739dc9b
font_01_sfnt_off0000cade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 14544 bytes
SHA-256: 3f53334b8daf089478fd575babc99a458ec2cc5068a978e9b6be147568ad1462