Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b207f01f8692f8…

MALICIOUS

PDF

84.9 KB Created: 2021-08-19 12:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a727f4b3be649e7d836e991d2d7ba91a SHA-1: 71a7b5c1a646dcd6f157d2e8274f1430aa206061 SHA-256: 32b207f01f8692f8dacc81d629d4da23c1df25db56694381a32b17f8f1e98469
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous external URIs and link farm heuristics indicates a deliberate effort to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609592f9ead93---lemuwezo.pdf In PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/ef678d0186dd456839df39071289e0fa/fogubebusutunu.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607661d687758---61584797800.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/fbc41f3c664de646a0d79050979ba554/93352796070.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/gipisunizuwetagerebepev.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/lametorot.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160844cf7d21ad---rezitujaw.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609672122ba6f---82933916529.pdfIn PDF document text
    • http://gyobel.it/public/file/9986562452.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/tosiwotarunub.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/13108801665.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/tovoranemosivuka.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/5e1db3910e68f6747138e8421c300013/rodug.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/muresos.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/jupufijojupabujoxutubod.pdfIn PDF document text
    • http://beachhigh65.com/clients/879402/File/radubisorani.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/19894470760.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5e6f709f0---buvugegasemedavajikisef.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16114f3bb89352---96428410920.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/giletusaxikoge.pdfIn PDF document text
    • https://mimpishiodua.com/contents//files/nerijogagovawode.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/208qnlbqokquaqa8824l6ij3uj/madozul.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/5th2h5uab2gst4q93mhko87mcs/foxafojitigoporenusakuba.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075769073fb5---43282895293.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/xalerej.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210724034749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=autores+de+la+teoria+del+comportamiento+organizacional+de+la+administracionPDF 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_off0000e61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61B 10996 bytes
SHA-256: 0feae2f40b1c413964aa1123dfb15228eb4ea200d94fed73505488051435f4d3
font_01_sfnt_off0000ff84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11796 17236 bytes
SHA-256: 136f0d55638d5e4aea3453e603041ac73e73bf33bcb92b1ea0343b63ac2b359a