Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b02a32eb9e966c…

MALICIOUS

PDF

83.7 KB Created: 2021-08-30 15:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 3a58337266bb35938657fae6cff83b80 SHA-1: 627198b116561df3dd0dd1d6a1ddb17e25e7fd05 SHA-256: 97b02a32eb9e966c6cc6258077f5c598cb38916956133bc53eae9d7da373a309
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. While no specific scripts were extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://music-group-store.com/upload/files/bolofarupuwafodenosotes.pdf In PDF document text
    • https://anthonygillant.com/userfiles/file/45468878742.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/38892823538.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/m2mqno0qske7ea5rm5r2nqta72/gefezuvunawolenupomerew.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5411c2692---14984660023.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/bef510305bef4b5011677ddc4845b8db/xuviwojolutut.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077620480641---24039928978.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609182ea53e84---rajase.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/vomewizivawakavanavenel.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/kenituxak.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/p02rte4qsjop2v7ejad0s66c2j/vojesu.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160f2beb480b4a---19613716583.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/56285426301.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e344995fe7---36613866265.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/63671238332.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/xivedabekolabuwe.pdfIn PDF document text
    • https://bem-sa.com/img/file/35152576684.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/0c6d0d6791d04fdfd3c1739f4acce63e/68433890029.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/18186867669.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/tupove.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3985a651---99641321728.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/fesepufabavokulebol.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/pel35eccme6l3f8qdq1iqud3qt/33379394975.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a053f86d6f4---vimasalifitobodukovix.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/mipajulapawekamuwex.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ae30b4fd71---bulow.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/kuvasepugakazezejom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=publicly+available+datasetsPDF 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_off0000e0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90D 18516 bytes
SHA-256: b4cbc40ce8d94b1e792282fb3cf5cb8a7ec50e0969de562b1de584f53ac30fa4
font_02_sfnt_off00012901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12901 10460 bytes
SHA-256: a873f01013fd764edb85d51814e4b769bffb010618c3b344b870dc7af9f2354e