Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e7e30d2a65e6b2…

MALICIOUS

PDF

99.2 KB Created: 2021-07-21 13:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: feea1f8a4365b963395a6d78e27049b3 SHA-1: 398c4c7565af874d562b0b0ed0d6ec7fbc270179 SHA-256: 01e7e30d2a65e6b2dc1af74c933500457bf0231aba30a1d004f62bc1aef88abc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://metafelix.it/userfiles/files/juvufojutugubil.pdf
    • http://muzycznescyzoryki.pl/userfiles/file/ladupiboroleri.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/df8c9c123d069b2677ddb0c5cc38a124/21641145408.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/ejj4i5to9st6pmfa8opch8r37l/xeguxudus.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a442aa1392a---jegazodowogizolej.pdf
    • http://extintoresorigen.com/images/editor/47246854533.pdf
    • http://goref.ru/files/file/dojosebezuzegimejel.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/860jb06pfcfr4dnieogjlocok2/xivimisiwowitasizoso.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/nesozanuxorulilegaki.pdf
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/wexipifoxurizorinew.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075e4c57db87---96608776499.pdf
    • http://daedukgs.com/admin/fckeditor/data/file/20210709081453.pdf
    • http://waterreducer.cn/d/files/kojemegixemejumexigovuxin.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/63051d6ea53217db1916bfcf7a5da80d/62781461935.pdf
    • http://commune-bourre.com/userfiles/file/ravedumizoxizi.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e86cb3cf9864f27972d5d9fea4526dc5/59709818512.pdf
    • http://kutscher-customs.de/gfx/userfiles/files/dabezijalum.pdf
    • https://tecnibat.net/uploads/archivos/76242127892.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-7/20210507141322411120.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/82dc8d4bdaa3d251fd5d93153f9162b5/zimotuwivumij.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/bt5rk1vsmh2tg4kle290nddki7/8289845464.pdf
    • http://fsanaq.com/upload/file/210708015858117127mitsju2f6a2p.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e21ee928e---8576560640.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=joint+capsule+contracture
    • 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_off00012148.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12148 16792 bytes
font_01_sfnt_off0001395f.bin
1ec445c6c5b6c4b31785c91d278591c2baae364ddb800316f008b4a7801fcae1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1395F 10456 bytes
font_02_sfnt_off00015146.bin
fff1cec6d94913d26bb6a4ef4925247f4db91ed6d8f7532a1829c18d1f238fb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x15146 17612 bytes