Malicious PDF — malware analysis report

Static analysis result for SHA-256 97dcd92631c97417…

MALICIOUS

PDF

81.4 KB Created: 2021-06-26 04:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e67b0db784fd6a47aa7a68f0664a4c4 SHA-1: 13802b81e83d3e07fdee788dbe16b88eef4079b1 SHA-256: 97dcd92631c97417c1e48d04965e404a2bebe521a12ef2c59a5721cb93bc282d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://argentum.com/wp-content/plugins/super-forms/uploads/php/files/kugr2u2thjko6m5k2apgfm7o2p/14341178188.pdf
    • http://thetuckerfamilyreunion.com/clients/67950/File/lapuluvelowigod.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/6gsjcdf0i6bkb84gnqubk7sjk7/lilomepafujoka.pdf
    • https://noddy.nu/images/file/babidu.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b419eb088---wigapoluketuminufa.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/67c18951c55307e37db6e37d5d507633/ridava.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf193d0459---bilogonamivameboruke.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085eb7e9fd8a---movulod.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/aiat925icfvr4fb8jbb0slbsg8/mewibuze.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/r9dfb7vboir8trsfn7d0m8o847/34914428987.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16085acdbd2c62---72017878157.pdf
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/womagotop.pdf
    • https://sssmri.com/ckfinder/userfiles/files/bopoziduxasuxe.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160cd85da81b49---zadodugamug.pdf
    • http://enotecagaribaldi.it/userfiles/files/wajuwusapakot.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/rlrgbpcg7hshftc4gvct5s1ec0/wunava.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082aaa6aa2a6---femikulilaxi.pdf
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210605_F68299F02837190F.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d144ccf6ba---kawumobibubaneteruxelo.pdf
    • https://kurishupally.org/userfiles/file/jivuvuget.pdf
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/83329796506.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/7071a65664434438f702b24a8485fc94/pesagizipovijuzu.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/c29edb178d6c8d4e88d1049062d4fd0e/kegugumepotu.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/20ecb6ce5618662160126db891b0400b/58516468380.pdf
    • https://strechybenesov.cz/content/kakomami.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/b20spit97vokpv3s1l9n1hulio/48209898346.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=interest+on+home+loan+deduction
    • 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_off0000de19.bin
5b3d297414b2385de6d281f3292f4b30f6dfcb56919caf72a8eee1c053cfa05a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 16168 bytes
font_01_sfnt_off000107d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107D5 16792 bytes
font_02_sfnt_off00011fec.bin
90eda77e404dc65e2cb0236757c827856c659ed5661109c4c0fbd7514925b27b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEC 10684 bytes