Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c206af069a766fa…

MALICIOUS

PDF

87.1 KB Created: 2021-09-19 19:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 2e0eb9638f3e94e771a51bfa9c753bee SHA-1: 2bdb58a1d5dfb19760cff036cabea55137071e8a SHA-256: 2c206af069a766fa298341b9260101afb32c44e7c67bf8ed336bc212dcef9422
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 ML classifier and ClamAV detection strongly suggest malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://tznjl.com/userfiles/files/pomemuwozoj.pdf In PDF document text
    • http://datev.hu/ckfinder/userfiles/files/gifasigubevimubewaz.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zasevizipalijudaraki.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/19918097158.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210916172836.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16144487056455---84803140445.pdfIn PDF document text
    • http://imhang.com/fckeditor/userfiles/image/70852851410.pdfIn PDF document text
    • https://x-software.cz/data/file/neraso.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/34843219603.pdfIn PDF document text
    • http://lulanjina.net/upload/files/pitijamubi.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/3efe72ab1545211907824f01d79faca5/36150614681.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/busedobusepe.pdfIn PDF document text
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/99223118849.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/20610265034.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16312506756467.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/datewejedizajap.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/21290767653.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161358b560efae---71061000384.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/pegovakigag.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b67bfdd28c---79741548878.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/77551795674.pdfIn PDF document text
    • https://ibericadearmerias.com/file/8122094544.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16130585106d50---51797997597.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/78860060169.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/kumudejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+wipe+android+phone+before+sellingPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4A 10992 bytes
SHA-256: edfd2272b01cc3bbe0fedad89668c854c2ae1fb3c675cea0936487ac487f39a5
font_01_sfnt_off0001044d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044D 19604 bytes
SHA-256: 1f32f2ae8ef7340caf25bce3f24bceda43a548834982a4e3dd0c148497629a27
font_02_sfnt_off0001363e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1