Malicious PDF — malware analysis report

Static analysis result for SHA-256 60afff6a4c537c19…

MALICIOUS

PDF

83.3 KB Created: 2021-06-21 16:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2d9e338a89fecad0f3ec5608f440ffc9 SHA-1: 43bea9bd0b3380d6bce0c1e763a2f9d23e2c7545 SHA-256: 60afff6a4c537c191b3ba2c39c356715c607c8fba32bb7fe62658597d57d9551
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The document's structure and embedded links indicate it is part of a link farm designed to obscure the ultimate destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://studionegro.net/userfiles/files/wurokuvugerilu.pdf In PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608094105fef5---viderogosuka.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfc383d2d7---jejesavezosivule.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/eus1a556ornv4lsfcckhr3f0m0/zuwugazelumosepololonu.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/de125558fd5e967537fe81cf0829564e/17450264071.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d0d87fb8b---34920279431.pdfIn PDF document text
    • https://diaspoassur.com/wp-content/plugins/super-forms/uploads/php/files/7c54d409a36e899274d5aceb1c346bb2/viguladaviwevebube.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b702040d0eb672fe21c4fa52759b9fb2/87955384770.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/82015815491.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5d136d93c---39182052708.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/51121361315.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/e83da168b9522965bf0d4f7ebcae25f9/3685324340.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/71285911158.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/40327843515.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be15ffba82f---tegetilipilutozonalof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=jnv+6th+class+entrance+exam+2021PDF 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://scripts.sil.org/OFLIn 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_off0000e014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE014 5636 bytes
SHA-256: 7949595b92838ca90b7f250e77ad5beda3d1f9534211a24e54f1d18e1cbc4ce4
font_01_sfnt_off0000f31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31F 11028 bytes
SHA-256: 79f4ad0cdb05e4be62d852bf292c4e73ec1fe57907faf225c768a917b143105e
font_02_sfnt_off000118d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D2 16096 bytes
SHA-256: 3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca
font_03_sfnt_off00012dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD8 4736 bytes
SHA-256: 755e1eb2a13d0dfe8545b38bd7a17175b0c43fc8d9874c6976db7c15a8c09150

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