Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb82412384957ec4…

MALICIOUS

PDF

99.8 KB Created: 2021-07-02 23:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cede7f380665eb24f6edf6d3854f8bfa SHA-1: fa0001ec596e38b802034320ca8d55d7719e84d6 SHA-256: cb82412384957ec450730966f834c9aa2cb97631479da4009a885280d43e7a9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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://www.reenactmentmarket.eu/images/wyswig_images/file/68404457547.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/3l70r5jhlefrh56g2q52lvtat7/60161706739.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/6sgfrlag4ococeenkqca356hf3/gixitavoriremo.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e1783ba58---zuradofegorogetegofi.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/9mj73gjld5pu2u1vf6abv6cbu3/17360993349.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160797af73a623---sapimezagele.pdf
    • https://alamansyria.com/userfiles/file/gosonogudomo.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9f2bc41cbbee6a582b405bc5faa26aa6/49944687867.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ba7d8a48---bejiwuvexewijamajusozalob.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607151b761b6e---27026548244.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d62a7a86ea---defebimepufupupos.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/0e0c54c43ba9a96e601f4b719679d192/dixuwitipekasikalelob.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a727548f375---sesagide.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/64f4470fd6075ac87e50c7756c1a13fc/kiruv.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c88257b4c64---wofebudisarunadubolekunet.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/555f5750f69d5d93439dc08f1a894e3f/tagagenedijujotinabuf.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/a1285c0883edd1e362e0dfe05c2843fd/49468082952.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/s9ktrqa97slbti62pk7v38td9j/serilufab.pdf
    • http://energy-labels.com/userfiles/file/tijaborapu.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0d83c8d99c228e5d1b2ecd75a3d2614d/14258442225.pdf
    • http://caphegiabao.com/upload/fck/file/14932959563.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16095afd7df77a---36407503122.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607446d292560---18103655795.pdf
    • http://aqbnb.com/uploadfile/file/tivibipiralofanus.pdf
    • http://jjmcp.jp/userfiles/Image/file/61829736262.pdf
    • http://pcwenhua.com/uploadimg/file/16234821811367797724.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078ad07b3a3d---rigelamorojopigamexid.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768fc55d43c---jiwodisu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=carpal+tunnel+popping+wrist
    • 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_off000124bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124BC 16792 bytes
font_01_sfnt_off00013cce.bin
5043903fbe1e8aed23cb59af695c28ab427daa5b506fcc7c2adda7a955cce84f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCE 16932 bytes
font_02_sfnt_off00016916.bin
f968051e3fc7256bc750b9afdd6d905a8a98d37b96b18c28769010cb21efad9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16916 10644 bytes

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