Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f80f9952756bb75…

MALICIOUS

PDF

80.4 KB Created: 2021-09-01 02:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 12a272161d9fe2b58664e974e5c18ab9 SHA-1: f743dc31fcc79de074336e193233574ffc38b487 SHA-256: 9f80f9952756bb756b80e59328be771a5ca7e8110184d5f4e3c106e565a492f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, likely serving as a link farm to distribute malware or facilitate phishing. The presence of external URIs and link farms on disposable or compromised hosting suggests an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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://pixomot.ru/uplcv?utm_term=gta+5+full+free+download+for+android PDF link annotation
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/a9514bb56e25a4a51271e43e219deaf2/72701027201.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/gisibuxewumofep.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/xukonubosuliv.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b630ed53fe8---wivuxulagovebakov.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/lawero.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b53a48667e---vaxopaj.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/058a3d438c51a26d22a77872ae026b74/6790361730.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/74326701713.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/18987430245.pdfIn PDF document text
    • http://huntland.hu/upload/file/wenonezez.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b5b1c6574---52535437317.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/0cbae6ee2ad65b7976c26e928092c5f9/70916653684.pdfIn PDF document text
    • http://capitalclassof1971.com/clients/4/4c/4c1e4f015ba9b8bec237dc1ca705466d/File/kepujezudejiz.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12782255585.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210807121946_1857851674.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/50997953142.pdfIn PDF document text
    • http://yoron.net/up/files/dobotezap.pdfIn PDF document text
    • http://greenbrier101.com/userimages/73253295942.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55433200485.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca415f29f4---84872859148.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/22231083218.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c909bc6e65---koruvunenaru.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/ia91v8c5movdtsa0phdimand04/jukime.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/99071337585.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/o7m357bg3i2amqeuciql5c33f5/86543165811.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5AE 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_01_sfnt_off0000be38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000d64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64A 18164 bytes
SHA-256: 79422c3870e7baf6b9b2d58423df257a38b95e1864b3c55ad52f4e717b3b1723
font_03_sfnt_off00010382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10382 10540 bytes
SHA-256: 3b8baf2e579ef7f20a23b9690b7cb9d26548b7e47989a1e0c0de3acebed5654e
font_04_sfnt_off00011bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC6 16128 bytes
SHA-256: e086d997b6ee3c3fe48f8fdf49e8854b9e9bef9c53b5c2c5f26bba4f2b277426

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