Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b6b6cee3a090ebb…

MALICIOUS

PDF

156.6 KB Created: 2021-09-07 11:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fea8aa0f77dfa25d81959b038a9a2501 SHA-1: 01fbf7cde2b2f8a58aad81aa40e27b157735cc30 SHA-256: 0b6b6cee3a090ebbc3f5d6ef8186280cd1500623dcb1f7790aed942fdd5881a6
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://yanarfabrics.com/firma/files/62097160675.pdf In PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/tefamirorujomed.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8661f50f66---73611568585.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083ee6d35a1a---69352939436.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/50038374137.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/vhcmnbvenkcaobs25j9gbq61sp/kedelubafi.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160af4b11bb213---17594897277.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/26358513903.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8af3c1d9af---65779264131.pdfIn PDF document text
    • https://unosms.us/userfiles/file/fogosejujoxufuw.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b864fb07ad4---wuvelevulasotavexepabogup.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/pbaqmshhjrrj138molu6j69hs8/32220623872.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/438a716f48526ca5cf98555571051a82/74112205122.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/84970716964.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c82bdd4862---30023389932.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/77236543755.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/gukolapakafin.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608054f841ee5---74164870273.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/tatedadulaxareg.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/9328254990.pdfIn PDF document text
    • http://tipiland.net/upload/file/4549084306.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/tutasuxaduforudabar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=definition+of+politics+by+different+scholars+pdfPDF 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_off0001fc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC5C 10972 bytes
SHA-256: 4e243630c442809736efff5487d1d11e2739621c940716b22529cab0c777afb5
font_01_sfnt_off0002158d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2158D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00022d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D9F 20752 bytes
SHA-256: 8276fffb2b54511a6ef5d10f4066865c470f4d544d4e2505d070d91b344a96fa

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