Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c08fb32ea5516f8…

MALICIOUS

PDF

94.5 KB Created: 2021-06-26 04:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e39b3ccbf08ad38b92c4c14f20be822a SHA-1: c6f5f96a0e9bb2274fd84a6753b75d7e4831db4f SHA-256: 9c08fb32ea5516f84525b829bf8b1d424bcec7820539c6af627cdd5a2d3c5f71
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The PDF structure and the presence of multiple links to potentially compromised upload directories strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/07509e05d7f4f45d086942c58e56df12/84570376812.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d095eff8a---31477079974.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/0b2813711338b3532a188f4b265b951d/likigokikonunabapawuzisez.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/dvtjqb7v5m5sdlsc5bmgb25bm2/99651537407.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef3ce15e2a---99795076736.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083c2b5c7f4b---polifukujifoko.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/mjhs1f8jbiq4unu6dbs2es19u8/16682439863.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/5auom9igob7mhcs2bee5h2vh23/67238066070.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8cafdd106---nunujafatu.pdf
    • http://nguyenquangcomputer.com/upload/ck/files/79691608660.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/dac6e918fb50b164d87284ed181d9e2a/kudekakevutefadutex.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/9b5d2sph3g2f6qh84p0q85e6n7/16039750801.pdf
    • https://vestol.bg/files/file/99390156718.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dcbc8fcf6---55565692880.pdf
    • http://tfh-filter.hu/_user/file/tonasotopisidabagere.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c06e7cdfa7f---42181465672.pdf
    • http://lapawan15.com/shop/fck_file/file/55362564573.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6e73b436c---16982240441.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/16ef6f07159df3e756012619d61128ec/65785388988.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d305fd78436---vuvex.pdf
    • https://appfacile.it/file/tisijozuxanaviberaxatewu.pdf
    • http://steelbo.com/uploads/admins/u0/files/20210607064809.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d92d7c9d1---7763216382.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1609d234ea655d---56416927362.pdf
    • http://euro520.net/userfiles/file/1622924251867760516.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=turn+off+and+turn+on
    • 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_off00010f51.bin
e477dce894d4345ff55ce92ccefb267f54395fae8956317bb000e02e50e6d186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F51 18072 bytes
font_01_sfnt_off00013eb5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB5 16792 bytes
font_02_sfnt_off000156cb.bin
c03e67705e2599532b58cb6caef1e1ee5049cca6450aee8ff1a4b04b28af07af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156CB 9972 bytes

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