Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e29984157d38ad0…

MALICIOUS

PDF

107.6 KB Created: 2021-09-08 12:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 99e8dd9458ebbfb62d00901a58324659 SHA-1: 4c6da8ef60e0545328197e743acb97702014eeb8 SHA-256: 1e29984157d38ad0bec708c8a1355cbb1bb13ee7a68cee41dbe5a8d56ac92a46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • 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://smidgel.ru/uplcv?utm_term=couveuse+artisanale+frigo+pdf PDF link annotation
    • http://gagutp.com/sa_upload/userfiles/file/20210528143456.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/biluxode.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2634f447ac---34986626437.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/vugejoket.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/06bebe8fpn0indh0d0atg9sdg9/sixanenepuma.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/sieifdie93418lc4v3jt0vdbll/levetoro.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/zoporadirafalanupefi.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/llou06u928d00ldvkntquf8p07/tagekijiselumebirozu.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/lujozap.pdfIn PDF document text
    • http://air-ned.com/uploads/files/48503778521.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/vaxozewikagup.pdfIn PDF document text
    • http://japan-railpass.info/images/blog//file/85196453418.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc071c3032---53722232836.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/15909356319.pdfIn PDF document text
    • https://auto826.com/uploads/files/lexexavolozufag.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/salodal.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089caf2d5795---41963181656.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/43669581532.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/bc5fac6b5a60a9c20bec9f3ad3d32343/wopidijasazazuzalifaxop.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db448d9ca16---81008663181.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/73388840866.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_off00013c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C26 20540 bytes
SHA-256: b2574d290ce21563e4d02608a42ed33760985c12ea19b278236785258a051375
font_01_sfnt_off00017027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17027 10872 bytes
SHA-256: e025cfef15cdd772079c0515b975b5e315ddc41d50b5e532c0501259a9f20d79
font_02_sfnt_off00018940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18940 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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