Malicious PDF — malware analysis report

Static analysis result for SHA-256 5300dccd8a505a90…

MALICIOUS

PDF

98.2 KB Created: 2021-07-01 15:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e3c28fc8023b82ee1853554a5cace7b7 SHA-1: 751a051786f25d79b5d78da077eca30c7b5f9622 SHA-256: 5300dccd8a505a90b4f3c08b9af0f8dffb4a2127af801c8096c02c1106c0248e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious content. While no scripts were explicitly extracted, the presence of multiple external URIs and the link farm structure strongly indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f6592c2b9---2361083541.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ea535b811---29846677089.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/km9cujvl6stlvtpp8rd3o3lrod/95739070732.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/c1d2f021345e84cbdcb4541f6a0ac37c/difaxelo.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f188eb775a---watujobulitudalunemajal.pdf
    • https://arrayamed.com/userfiles/file/26625043704.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/7t07bjjgl405d156nass5t1dvo/71546442089.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f2e860232---81886422198.pdf
    • http://suamayin.biz/userfiles/file/gagebojokek.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c56eed0296---firazapotim.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074247a7323e---perorovumekowazejiber.pdf
    • http://sushrutproctology.org/ckfinder/userfiles/files/40167063017.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/3458dd584f78cc7e9e9f37112215794b/figeral.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/84ef52bcf1d5eece32ea482b448e0ee6/zutaninenakun.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/38196f7750212625cacd0ac9e61c2f22/31184578760.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16082637a84906---60379266251.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/eefbe1fd2d6042f26e73889c8e4d17b0/xeberabelomo.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081cccebf27c---lovozuleg.pdf
    • https://medicentrumnz.eu/medicentrum/files/file/pagasawixidopusuriwigi.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f9b8ab479---welenopokunozirekofax.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/84ce0efaaf28dc74180ad0a4e15dba36/gexupefegalutekedebu.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2c17871e3---66282499191.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3aa2a981---59678709543.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d87c2d9c50---74467944879.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=charlize+theron+now
    • 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_off00011d08.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D08 16792 bytes
font_01_sfnt_off0001351f.bin
c2f5e8ef99069ee9aab4bdba20d4acbe8e43124e280dae2c8d14557edbbc5ebd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1351F 10216 bytes
font_02_sfnt_off00014c10.bin
153d8e7a6024b0741a66ddaceace51af84c86c679fe707b864235422fd5c3321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C10 18704 bytes

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