Malicious PDF — malware analysis report

Static analysis result for SHA-256 6893fbe221ccc432…

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 12:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d719215ccde35d840564db147bb1f5d7 SHA-1: 851481613a1368c66d546560348f4349bfd15d57 SHA-256: 6893fbe221ccc432f2cd3b9cd2b760b2e185bba42050eace5dac14780209a7fd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or redirect users. The document body was unreadable, but the heuristics strongly indicate a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c6c33f75c---11626237505.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3006c3a227---96753723714.pdf
    • http://malagi.pl/user-files/fck/file/31995899291.pdf
    • https://ecoretras.com/file/55735665519.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c9dbe7cdf0d---58423434564.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/cvq9j8uuem9t0olcbmgqspnd4v/57003650869.pdf
    • http://salsainkonstanz.de/media/files/xusimakim.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160982f3c4c07e---minoxunovanutexudanorot.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c73418ae0---6679561558.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/c9e801ba3a7d130b25865d51a332caaf/48587863690.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607942b884d26---vidofowoneno.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9e42f105e---77646491077.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a50fb37c804---49277207553.pdf
    • http://szao-spb.ru/images/news/file/xuseviz.pdf
    • https://maclashoes.it/file/1720159638.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/56740345326.pdf
    • https://balajitutorial.com/admin/userfiles/file/natoru.pdf
    • http://zulassung4you.de/bilder/file/kebip.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607147c2a7d11---nutulijewoxidozokizagodo.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/ee1d1c58bbbff038a01c514357589f90/49408203898.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/f0c7acd78b4fb53647075978e93a64f8/niduvosedulumapumatoxo.pdf
    • http://architects-desk.com/uploadsfile/48379550037.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3b4f7db24---koxigivikat.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/e0056e76927e5ab3494f06d0f3dda51f/tisopujamixiruwozubume.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=fetal+heartbeat+app+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea72.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA72 16792 bytes
font_01_sfnt_off00010284.bin
13a73b2cd4b43dd91cc30d261d7eb5f94f8a3b763a6bc2e20e8294bc0999c9ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x10284 17040 bytes
font_02_sfnt_off00012ec4.bin
f78fe86b04199e6928368aebd9ed22b6882664079d57d26159b318762cffaf51
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC4 10436 bytes