Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d474245a8ea2a3…

MALICIOUS

PDF

80.5 KB Created: 2021-09-11 20:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bb874edb4473e027af8bef414a0a9b16 SHA-1: 665b35915ab9695c8390e3987e43d2bf48caa089 SHA-256: b8d474245a8ea2a399a481e42fd0f8325ac03e97b97fb9fcd474ff623250623b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates a potential callback phishing or tech-support scam pattern, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pixomot.ru/uplcv?utm_term=latest+android+games+released PDF link annotation
    • http://poney-club-romilly-aigre28.fr/userfiles/file/mizedi.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/74975424702.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/21581047933.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/71363084875.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/79417966051.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/tebebobuvu.pdfIn PDF document text
    • https://blokhol.com/upload/files/95625512315.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99307010476.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/57962433568.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109052101041862.pdfIn PDF document text
    • http://lapmaymn.samdigroup.vn/app/webroot/upload/files/16494160180.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138aa761e87f---86992844222.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/ed0c8947696740ab9fe37fd3d5cfd6f3/vobibofazot.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161373cbd5be3c---xudokisakutojamawejut.pdfIn PDF document text
    • http://dastone.ru/userfiles/file/zutaxo.pdfIn PDF document text
    • https://shibbirs.com/media/files/tisojid.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/93693640869.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/9047479612.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/jasatepedevawapugag.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///semopajine.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/desovapufijif.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/gedokufivagazu.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_off0000d7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 10548 bytes
SHA-256: b2abbf772e417551f63fee708d6f1511fb3ec6927d22f95fb07673f39f097ef7
font_02_sfnt_off0001079d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079D 17576 bytes
SHA-256: 1784fde4220cd5f6bada8acb7f69ccab1f7e4a29fab19957110dd3c9e1f02709

Open this report in the interactive analyzer, or submit your own file for analysis.