Malicious PDF — malware analysis report

Static analysis result for SHA-256 df17641dcf4c14cd…

MALICIOUS

PDF

93.8 KB Created: 2021-07-03 16:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 226796aeae4737a64792706a20f9e084 SHA-1: 4b569baf626fd2e205e3b19ad56d96ea2b1aa989 SHA-256: df17641dcf4c14cd95d4f488c17502d5a99c2fbf132616e0c591a6398fcd4285
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/c509960893a610853cab8efbca46f928/43011947294.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ab1uup01ei61idkoqrfg0sghsd/63539579706.pdf
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/sukupuleveduboxudimele.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160abd95470906---mimeterajokani.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/fd7d69013763f654713fceb0ea4b50f2/76286849419.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160843d8701b0c---vubaniw.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ced7fdecc01---74194002307.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16216067038276.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/hs2mr87dquscb2bamp5kgkm0n1/xivitijoj.pdf
    • http://heninrealty.com/userfiles/files/63520578462.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/utaj6po3iqc72svjo4p4tb1e44/kavenivinanu.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/9049fbcd4762ea3a4c99621833ca7d5d/vakemoradexisuvakit.pdf
    • http://bukharasuwanee.com/sites/default/files/file/24680957919.pdf
    • http://czytamzezrozumieniem.pl/userfiles/file/bekudenavenuxive.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3a7a7025e---wumowadomuratenun.pdf
    • http://ahcxdq.com/uploads/file/180444047834.pdf
    • https://mimpiindah2.com/contents//files/36049000098.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/296f427219816ff1d3b4b595280b9537/zulesesakowovexij.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/1dm2uck6908122ovqr0bklklrd/41220295040.pdf
    • http://elcampoeco.org/FCKeditor/file/24585526843.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/ebe87c5aa1620666e55e8c0a75442080/tijavinabopunilukopa.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/d27a88ce6591fc3d6efc12fbf9ec3ba1/lefuvexozadam.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=hungarian+chicken+and+dumplings
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f728.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xF728 16312 bytes
font_01_sfnt_off00010d2f.bin
82925d901b28e2c59a65374dfe813cb9241ca6c73970009b2f23ee8d154b921f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 16916 bytes
font_02_sfnt_off000138a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x138A9 16792 bytes
font_03_sfnt_off000150c0.bin
519842616c36e62177c4ef2f695afdc1d78e3ef62c69a4cdb69519a0ef4be480
pdf-font-stream PDF embedded font (sfnt) at offset 0x150C0 10928 bytes