Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf9c45a08b41c36…

MALICIOUS

PDF

201.1 KB Created: 2021-07-31 00:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 47b6050d61e06231ca0fe2dd1ab36735 SHA-1: 685975f07b886560f0b3679ae073d2615cfa60f3 SHA-256: fcf9c45a08b41c361cb4807a5f4f3ff6a9f16616def920d9fc1d7a2dd37d562a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host or distribute malicious files. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7823

Heuristics 5

  • 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.
  • 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://distributoram.com/files/file/29373287465.pdf In PDF document text
    • http://www.heksan.com.pl/file/57979303882.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/b6c950f6e140c24f2d7c8f218a363bfc/bejifajubewuxejosibisobe.pdfIn PDF document text
    • http://2021woods.com/clients/b/b0/b0e6999751250b7f6f06d89f33415bdd/File/xonexuzevuposajoxepedeta.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/dae22a732869f4e9b6d2cf5e23d95417/muxezasumijepiraso.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16083c6a7abd0a---7320792727.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/26113433332.pdfIn PDF document text
    • https://yuktogel.com/contents//files/80875461408.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/c5b1493afa434e5d1dd3bb347918aa1c/pujiwevurote.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/gavedoxikemupumogipom.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/jikevo.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d112c4168---54902571519.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/66403b2ec0ec0fadd1e5fb6e5ceab18b/73324456782.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/294ce356c6ee378a04a98dac5aef7d30/36682629291.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1037446e4c---843984528.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/xisivuwakugajinigukono.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/1lg988t87hdnc8f5vvjakaro28/rerewapofirenizaf.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/41399321185.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/aba6af0a24d6f280683f7bec87da391c/32724661091.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/ladafuwiniwoxenanad.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/5lj50597899osmf9q3qlk2v3v9/bavifunevimoxekefin.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4444ce1b7d---18168073855.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/67163249964.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/96099039777.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=spanish+phonetic+alphabet+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24738 50064 bytes
SHA-256: be76bb4d7c46473c5aa159fccaaad989229aa098c73e794917ffc609318589cf
font_01_sfnt_off0002c6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C6D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002dee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEE8 10832 bytes
SHA-256: 800e80dc2a91404453d401f48cf584761d660b535496c079d0091bbe348a35eb
font_03_sfnt_off0002f78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F78B 17872 bytes
SHA-256: 3500ca9e889f9c362eb298b400c1ef7abe2bb6ccdd560d496cb8fb495795648e