Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe382df83c12cfa…

MALICIOUS

PDF

177.2 KB Created: 2021-08-02 06:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 31b21edc61165ca9e1d56639e6105f13 SHA-1: 7e1f3b3f063c03da7647fe2b5401feb56feb9d36 SHA-256: 7fe382df83c12cfa1f5b0136389837086b49d47cd6c2024c40aaa8e4db87573c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It impersonates eBay and directs users to a link hosted on pistant.ru, which is likely a credential harvesting page. The PDF also contains numerous links to compromised WordPress upload directories, suggesting a broader campaign of distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://pistant.ru/uplcv?utm_term=little+witch+academia+free+download.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pistant.ru/uplcv?utm_term=little+witch+academia+free+download PDF link annotation
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbab26e56d1---mobixogagonalekezokewideg.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/lowisolu.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba695c0648---xosaditewinifuz.pdfIn PDF document text
    • http://potya.com/fiviro.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/5a63533012df49661cef832dd90b8729/26635136932.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c17e3bfe1---58686122472.pdfIn PDF document text
    • http://northcity.rs/slike/files/28654306801.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/m3ddc8dh73ou1abola90ou2123/xomuxidib.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3656e85123---niwinutupu.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/mututinage.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160855e2c89bff---gisidokofi.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/xanedevokuza.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/vorazalivigaxezuvamovixi.pdfIn PDF document text
    • https://alutat.com/data/file/sumimelazidewaxavukadosam.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e3541ea7a---93239594285.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b802a69025d---59832114647.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160c76e52356f8---fozuzanufoleburim.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d266065b3b6---36956772066.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/lpmbo1egs7j6p7tenvnmpkp6nm/mejafatatetawogoneta.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/42496339329.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/dupaz.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/kupaponugurulafozesemajuw.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/kabagojasutizelejut.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_off0002573b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2573B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00026f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26F4D 17936 bytes
SHA-256: 9b545869c69c7a0348e68ee95a525e04cedad5b58675a75f1618626a845d4adf
font_02_sfnt_off00029e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29E33 10616 bytes
SHA-256: ac2ad6478a2a0790db137793da41a67a152235fdfc4debb95a30c5392e388ade

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