Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6439a6b517ab8c…

MALICIOUS

PDF

145.4 KB Created: 2021-07-05 17:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b176a8cc4ac76ce58defa2e2e88fe500 SHA-1: 072cfb8e35fb3e3dfe591dd76f39afd5fb655a37 SHA-256: 2d6439a6b517ab8c47c84fa6991d6c802d25db8d51636dda69c13e490b182477
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam. The presence of multiple links and the nature of the hosting suggest an attempt to distribute malicious content or manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b90fc6a71fd---wenipepugeno.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/97d83ba6e9beb25825de6f20507394cf/37663543868.pdf
    • https://office-agglo-larochelle.fr/userfiles/file/vibogiwufaposijasogekiluj.pdf
    • http://accessiblevehicleservices.com/userfiles/file/jevexopoxutovo.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/eae8a355762c1806f98adedbfebc460e/89638078902.pdf
    • https://ludifrance.fr/userfiles/file/98144406380.pdf
    • http://msinziniering.com/userfiles/file/27380580066.pdf
    • http://rahwayhigh.com/clients/42761/File/povamagepowisipunuj.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/c69085052a06a7e6b176bea7e0c86e56/72067944126.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16072519069beb---lejiva.pdf
    • http://angelescare.com/userfiles/file/43721903799.pdf
    • https://cavalier-hundezucht.ch/userfiles/file/8126603732.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089511a4fa0e---saxodofoj.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6808a51d7---16392943835.pdf
    • http://roycraft.ca/userfiles/file/kebetapezodosikuxit.pdf
    • http://ettermanenterprises.com/ckfinder/userfiles/files/fijeteri.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072627fd4cc7---57690797740.pdf
    • https://aduanaldelvalle.com/userfiles/file/momarewokof.pdf
    • http://ipsgroupjjn.org/userfiles/file/19879475349.pdf
    • http://anhuizpyy.com/upload_fck/file/2021-5-5/20210505092649709053.pdf
    • https://cambodiadriverservice.com/userfiles/file/dazanipuko.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3163f37d78---72784816352.pdf
    • https://gannat-ltd.com/userfiles/file/guliganabimujijokasuf.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/4a8af8f94116887c8abfd87673cfe323/69036292884.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=ielts+book+14+reading+test+2+answers
    • 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_off0001d525.bin
93b93313870d35bde3d9aee3657abaf5c217d3fb3a5a6db1432f980bd0d94511
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D525 18488 bytes
font_01_sfnt_off00020660.bin
cae9eb0101c83b85a9d3ce57156a3bea859b23ef212fa3740a3078f56dc3655b
pdf-font-stream PDF embedded font (sfnt) at offset 0x20660 10944 bytes
font_02_sfnt_off00021fd6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x21FD6 16792 bytes