Malicious PDF — malware analysis report

Static analysis result for SHA-256 198d3f96f352ca4e…

MALICIOUS

PDF

80.9 KB Created: 2021-10-10 12:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4c0a5279d1e83fe0f998fda1472f516e SHA-1: 9184398eb6cb279cbd360d74c2d2f679bf3eeaa9 SHA-256: 198d3f96f352ca4ef87970463d60e54d390b931c81fd3e0b4c305c62aa0be533
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable domains. The embedded URLs, such as http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161608a90e71d0---68273407414.pdf, are likely used to host further malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://www.gabrielamaciel.net/images/content/file/58137863138.pdf In PDF document text
    • http://tradotel-riviera.com/file/molamoduxobirizezamasexa.pdfIn PDF document text
    • http://vipdiler.ru/files/file/83117488840.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161608a90e71d0---68273407414.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/gekararepi.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/foturuvemapuviji.pdfIn PDF document text
    • https://fong-cai.com/upload/files/89274984072.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/sikezagigopalunasirumavop.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/61950281508.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/3095252259.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/45294627797.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/zapozer.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/74440548911.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/jm9cphffsp7jbm7jk7o5henl12/pubezusi.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/87941046301.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/161430c4312f5b---87803843273.pdfIn PDF document text
    • https://igraonica.me/userfiles/file/sewudotemoxakilujodamenu.pdfIn PDF document text
    • http://ibb-online.ru/f/file/vawadataxegiziwet.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/14316390266.pdfIn PDF document text
    • http://flyingwedge.com/uploads/assets/file/soredatesamomoxavaxinaw.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/d63175da71a1e94b0e35fe90173221c5/punepagamesam.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/20231776834.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1632081041.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+make+slime+without+activatorPDF 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_off0000d8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A7 17192 bytes
SHA-256: 699a9ce83c81554653556e6f725df8976125fbadbeb855d33882e434ba5d63f2
font_01_sfnt_off000104f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F0 10728 bytes
SHA-256: 328aa4ced024d5ee9aaf90c443792d909f8207302951d121835a95acd680127e
font_02_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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