Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a67adb472d6a463…

MALICIOUS

PDF

80.0 KB Created: 2021-09-17 15:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f78467eb5bb73d293347193c7410e9a7 SHA-1: 6f86bc9a78841279a55f69a994f1efe74b9c332e SHA-256: 0a67adb472d6a4636f2260430b559a126acbdc64dbf1a61d1037b14d7a2ccbaa
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

This PDF document exhibits characteristics of a phishing lure, specifically designed to harvest credentials or exploit multi-factor authentication mechanisms. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations, suggesting a link farm for distributing malicious content. The presence of a callback lure further indicates an attempt to engage the user through deceptive means, likely to extract sensitive information or trick them into performing an action under false pretenses.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://crewmak.ru/uplcv?utm_term=how+to+find+telegram+account+using+phone+number PDF link annotation
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/cd53c77658393d579cbbf9f25a2cb3b9/zomuboferaxopat.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vasodumumozanaju.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/govuzawa.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/ce0f3b24950110b5c106bf3882baf3ea/30660877663.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/94043787088.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/morurilixawumiwelunexe.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/39317771949.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161329064a6f08---kedofofujogumenoletelovi.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139ae283dfa4---70198637814.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/35645581298.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/fagivusuza.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/57090581060.pdfIn PDF document text
    • https://digitaluzaktanegitim.com/calisma2/files/uploads/fupakifidijabekidojuf.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/leporomezosenabukakaki.pdfIn PDF document text
    • http://sakulchaiplace.com/Uploads/file/48863116214.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/sijizilipejiluxuva.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/luwijedavuxa.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ok3b6a32ehf66avnv47353snu4/vebusuvonodeponojuwamo.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/bidibujizinufux.pdfIn PDF document text
    • https://okazionche.com/files/rarisesubexi.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/44397215883.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/bepixuxeluxugogukefukox.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/76908108087.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_off0000d1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DC 17760 bytes
SHA-256: 3ff076e8e0beac6c5d4786c7fc4244e4a0bb389fb041db965b246a565b6a3cc1
font_01_sfnt_off0000ffd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD1 11384 bytes
SHA-256: 93f30cfc26456d05df3a3042067b333e4ee9f51a7dd6630654d5e44fda50f477
font_02_sfnt_off00011a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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