Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b69a00018fc865…

MALICIOUS

PDF

83.8 KB Created: 2021-07-06 16:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f01af445f7fa311a5fb860e823cf073f SHA-1: c6f918f04a70fa2a2ee66e51901e0e41293237ce SHA-256: 68b69a00018fc865d909d2dce5533fc19623a2b1d8a1400c3e8a46a612960c5f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers confirm its malicious nature, specifically flagging it as a phishing trojan. The embedded URLs and the heuristic firings strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c34391d9924---77909863144.pdf In PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/ca1e331cc966919c6a6284376ccaaf48/22701377021.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/tibifo.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/a3bee36d82fe7fba2ee0ecfae3321088/rawajowini.pdfIn PDF document text
    • http://abpaluso.com/upload/file/14624786794.pdfIn PDF document text
    • http://www.kymkarajok.net/tiedostot/files/funub.pdfIn PDF document text
    • https://sankohomestay.com/userfiles/files/zoteguvubebunoliwojil.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/37675554820.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/ntf1ufensf4hcb6024002g1l00/zefekilomogavazoz.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/3c405429fefd426eedd0cf1a2c88d8fd/4422886836.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/8dc9bd9e0dc202449327bb5118a67136/mojivirapepejewet.pdfIn PDF document text
    • http://tfforming.ru/d/files/waxowipamofegusunewo.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/36834745329.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/hnpq47jtl49j7nvfc93p8plmh1/70472153371.pdfIn PDF document text
    • https://people11people.gr/uploads/File/89866178987.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5845ed6e1f---96800270546.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/0f11e010efecd51f8564c40626ada3c8/gojaxagefamixudiwixurez.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/34598132703.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082c582ba39a---zidirebinatabitanike.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/lonemanuvokisutoxawan.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/jl71ueeq1899e85ugp9cp39fc5/93297570861.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=reboot+in+safe+modePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC55 17384 bytes
SHA-256: 7be5c94a71ef0371b9d3703f1986c952b6aa0a12ae7c92db56ec10cb67d201f1
font_02_sfnt_off00012a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4A 10556 bytes
SHA-256: 82efc5403bb26d02b22e224946977bb270b2272fa2b5cf76e9208f4f3e3c3f00

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