Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68b526627886458…

MALICIOUS

PDF

81.8 KB Created: 2021-09-20 08:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cef6b439bb54acbd6be11236a2d09f6d SHA-1: e5a2fb9f467107e512153c1b11c86a4ac48e975b SHA-256: f68b5266278864587746f10f05f922eaf9d416e9112039616db94d32f8198587
204 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a credential phishing lure. It contains embedded JavaScript and numerous URLs, some pointing to compromised WordPress sites, suggesting it's designed to redirect users to phishing pages. The heuristic 'SE_MFA_LURE' strongly indicates the document's intent is to harvest credentials by requesting one-time codes or MFA confirmations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=configure+hotmail+in+android PDF link annotation
    • http://monticellotownship.org/userfiles/file/wabosipaxagiloderoboje.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/kumitosirexuxetebanisez.pdfIn PDF document text
    • https://mimpishio2bet.com/contents/files/pedogebegu.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///20507739554.pdfIn PDF document text
    • http://5thaveseniors.org/userfiles/file/14675521222.pdfIn PDF document text
    • http://jadeite.ru/images/file/pejubukujiwopobadozetewo.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144ed948d133---vebexedabuzitidis.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8fed54b73---358712848.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/58245099792.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/vovamemijopasogone.pdfIn PDF document text
    • http://cetis156.neutronds.com/assets/js/ckfinder/userfiles/files/xewobuvaxobemujib.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/97078211779.pdfIn PDF document text
    • http://whdhgs.com/uploads/file/20210904180636362.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ie33utmgn8lrcbjp78sle8uocs/67569490375.pdfIn PDF document text
    • https://jpt.mysmartedu.com/uploadimages/files/vulizevevuwot.pdfIn PDF document text
    • http://usagimatur.com/files/others/rivodisixituzulof.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/46183671538.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/b9f0e30d7e310136a9e0e9ee6c06d20f/75116620417.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/xobafobaf.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/93247888322.pdfIn PDF document text
    • https://senarathgroup.lk/assets/media/file/87966788679.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/90046511663.pdfIn PDF document text
    • https://bauarch.bg/files/fadukufipaj.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/47331089207.pdfIn PDF document text
    • https://euchebnici.com/img/file/dubede.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_off0000dc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5E 17280 bytes
SHA-256: c4e587d226e77f1647634c7ed68a8beeec359ad78234c30fee2f7c598d8e6023
font_01_sfnt_off00010889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A0 10764 bytes
SHA-256: 86c418962edc91fdf12b7cd45050f81624e459cbd04210fb6dd50127895190b5

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