Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c34adba18cd935…

MALICIOUS

PDF

82.8 KB Created: 2021-09-17 17:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7a8022ba02678f2c8088d46481c09229 SHA-1: 2ffc0d1b7c25320a3a6941b3c01be3870e86329e SHA-256: c1c34adba18cd935649d56c775b17c5e59c3665cc63cc86ae8c6fc01e0bb9902
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs that point to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://pixomot.ru/uplcv?utm_term=paste+in+android PDF link annotation
    • http://greensketch.in/userfiles/file/wisexagabuwujogedojoponi.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/38084421019.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/vilokuvatijaxajilapi.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161365528926f3---54082195198.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/43700332319.pdfIn PDF document text
    • http://gleb777.com/fck_upload/file/95102481313.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/lasisojazenuxowunibuza.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/sazazumulakibi.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/tcp1mpvdo9hm1o9hhmjas31jan/14230431791.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/33006873221.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32172136712.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/74595422403.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/gofijexapegukul.pdfIn PDF document text
    • https://partnermind.cz/images/files/23686890732.pdfIn PDF document text
    • http://phonphangschool.com/upload/files/bafip.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/71389637069.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/62654123392.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/37103225500.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/95156118913.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e34ca0952e00dfcc758743f598d3bf6d/wivud.pdfIn PDF document text
    • https://ovistar-dz.com/ckfinder/userfiles/files/dizoluwivuwo.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/majapebulenotepebuxanav.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/55266667843.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/14234201793.pdfIn PDF document text
    • https://zooiguana.pl/app/webroot/media/files/99926308012.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_off0000e0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BD 10196 bytes
SHA-256: 5871fdc34ae21fd6c8870a2b0fd9936c9894878002d8fb26fa79b8ee31545862
font_01_sfnt_off0000f7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B8 17740 bytes
SHA-256: d8a56a99bfb755c7756fbc3304ff37ef5002ef2593df89c5e2dca567a5832f7a
font_02_sfnt_off000125cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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