Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fd17348156fd0d…

MALICIOUS

PDF

85.8 KB Created: 2021-09-18 06:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c77503b3a71e867b3422966678b54feb SHA-1: c90a4056ece8095ccf2331c5521c6ba7b3291a25 SHA-256: 80fd17348156fd0d21b21be3cdeb438421f0abb732b7d986fd8998cd652c3bcb
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites or disposable domains. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://krisoc.ru/uplcv?utm_term=pervert+games+for+android PDF link annotation
    • http://balletpanov.com/uploads/files/dexipokoxigevametidagek.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/94797836916.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9a5885782---55941387226.pdfIn PDF document text
    • http://imoroz.by/upload/file/faroxowefawisimatimifiv.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/45589303180.pdfIn PDF document text
    • https://bagstyle.uz/images/file/zotitiwetuv.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409199cb8fb---nefupuma.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/jkbqj35mp9q639c1vo1eoga7m7/fuzutadawonowapow.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/63393022360.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/88982096012.pdfIn PDF document text
    • http://gardens-spa.com/user_pict/file/23999758152.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/17721055888.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/50112803143.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/gebopasobanepezi.pdfIn PDF document text
    • http://eegbiofeedback-leszno.pl/userfiles/file/31800401213.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/gobunurebunesamisebamu.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/4370030828.pdfIn PDF document text
    • http://agilesolutions.in/uploads/55196057369.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/gonaketumajafuxukaxel.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/75849233027.pdfIn PDF document text
    • http://midesignvn.com/uploads/files/48188963660.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/piderutagime.pdfIn PDF document text
    • http://xn--2e0b95unoa536adofm5h.com/userfiles/file/jebogafirekabam.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/lugizib.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/161455b3532303---jupuzewexonipuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC4 17296 bytes
SHA-256: 6803be57f4dd60d2af5025fb5b4d32708f9d328f4487893ed621d707c9861d60
font_01_sfnt_off00011997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11997 10720 bytes
SHA-256: fb2675b5b1f5ba02a8b00fdf2edcc9140f2f183ffdb6499ba3b798211bd797c4
font_02_sfnt_off0001320e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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