Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e52d0cdae8a222…

MALICIOUS

PDF

80.6 KB Created: 2021-09-20 21:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c7261745fb574116c8bf5e40f35a9f7d SHA-1: 56e5c9130dacce7c4c83ac707a1d80deccd77743 SHA-256: 47e52d0cdae8a2220c60f82e882649a1f5f112bbe3fb3b4d0458a7862f96e4e8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://chcial.ru/uplcv?utm_term=open+xapk+file+on+android PDF link annotation
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/romuleduwaburuzovak.pdfIn PDF document text
    • https://karapinler.com/calisma2/files/uploads/42776983537.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613baa07ecbfc---rugik.pdfIn PDF document text
    • http://epmachine.ru/d/files/55358533015.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/ac200bc270b6fb755f60529e057001ae/78689749098.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/7705000936.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/xigisazanejoloxoxop.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/roven.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/68830924993.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/78143478438.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/lexuj.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/85080577596.pdfIn PDF document text
    • http://satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/wegazofunima.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/kborstppla44stjdjh9ensn785/37538205668.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/firibonutigevane.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/jbhjbtpekkcj5osoanu79b6057/50748914124.pdfIn PDF document text
    • https://loyd.rs/images/file/bobavakepijofaguziwoked.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/favidijusemulazorijadis.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/98639922221.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/74510705512.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/10334763396.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/50350623631.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/wixeg.pdfIn PDF document text
    • https://sibirprokat.ru/ckfinder/userfiles/files/66091218173.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/kanedokefanimeme.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_off0000d6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A9 17668 bytes
SHA-256: 011916e6283ee7aa737a491ea185d8e0277c1e7df215fd6180673e99266d6390
font_01_sfnt_off000104af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC6 10444 bytes
SHA-256: 4a5c22692bdf1f1988375db0ac31ec18b76bbf102e8a9abb5dae0d555f4fcc61

Open this report in the interactive analyzer, or submit your own file for analysis.