Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2174989eb0c7272…

MALICIOUS

PDF

86.3 KB Created: 2021-06-26 01:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2a13e3e15b484cb9e8c52055ff71939 SHA-1: cc3f96138b296f24e647163a189eeb5731b8044b SHA-256: d2174989eb0c727226807dc946bf00ee9a28199b76c24be4e15bd72e49a4469a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple distinct hosts, many of which are compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d026b7ea9e---fadazepul.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/c62f89a6c04bca403b092bc0ff1bb1ea/69071443911.pdf
    • http://cambridgekapurthala.com/damana/userfiles/file/nutadavofetifowevibixaruz.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a7195b2bb---titusawejukowurusireji.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/g1c12rg44fheehmgl84t1rst8o/53040338652.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b106bfa4d39db6cc17314caf96868ad3/17654353297.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/b76c5ddb6b8229d2ef80f1f2739be9cd/xumidepeju.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160829f63a8bb8---fosamasefajibesafab.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/a6fd1f81d1a05c535270a3d939410734/53159748764.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd8a27fcb2---11112805236.pdf
    • http://evpltravel.com/xv_image/file/3083434926.pdf
    • http://debden.org/userfiles/file/fumazababodironatelepo.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/pr3urpotk0529an1k1j52niref/tifevuwozogivebes.pdf
    • https://mszukam.pl/dat//file/99294876711.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/327286c0c15786f677f1e54959635292/demolavopujidixamuwubi.pdf
    • https://appvid.eus/userfiles/files/1318438190.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ib9599tckokl6dqg6q40u2u2p0/fejosirim.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b26f35da48e---benopezox.pdf
    • http://symbioticlifetech.org/attfile/fckimg/file///20210620134458_896687847.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/gk9pqfb159olr7bfbdeoc6hvh2/29435321343.pdf
    • https://avela.md/userfiles/file/zifuxeper.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/2ffefbec979e4c7fdb42c2ae6de7d541/84007432532.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff566be733---mopud.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0669c5506---13496947997.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/75d6eb89ebcf8b18ef54c0667fc83349/mopezatinekub.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=ohm%27s+law+to+find+resistance
    • 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_off0000edc8.bin
2de7533ea7df9941b4705a21cc1a6871694ec74e5bc55caaaa761cb0fe30ef34
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC8 17056 bytes
font_01_sfnt_off00011a86.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A86 16792 bytes
font_02_sfnt_off0001329d.bin
0c6536905b4e10cda26eef42d5b0b42d5ed652b9cf538509bc437a0260a62163
pdf-font-stream PDF embedded font (sfnt) at offset 0x1329D 10884 bytes