Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2072f2c0e236d1…

MALICIOUS

PDF

68.2 KB Created: 2021-09-13 22:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4baace2da654e69648363edcf60ba624 SHA-1: 36d90740ddb457eef8ac628ee7577c39a4eb97ed SHA-256: 9e2072f2c0e236d1459b2d9a2e40d00b18d51641ab09259a432b4ca2082e74ae
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of external URI heuristics and link farm indicators further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://crysiq.ru/uplcv?utm_term=x+men+gba
    • https://vibanghanoi.com/uploads/files/fivonuzakifixubaf.pdf
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/27581212147.pdf
    • http://primeasset.hu/fileok/file/70947168697.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4ec383f79---45147741733.pdf
    • http://invismortgagebroker.com/images/file/nupanuvovoxemewofoja.pdf
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/susatopepilo.pdf
    • https://gangnampools.com/contents/files/davusasejumapenafu.pdf
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/fenavesubure.pdf
    • https://numen-wow.com/userfiles/cloud/files/58390230815.pdf
    • http://mid-europe-ex.com/images/blog/file/20395830797.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1613dce938abbc---59577334200.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16133bcdf812bb---betotumudatekadiwebija.pdf
    • https://relans-nn.ru/images/docs/file/34986634129.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbe9da5062---98301425235.pdf
    • http://www.de.ruben.pl/ckfinder/userfiles/files/80710847831.pdf
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/wivujelilisavusugijata.pdf
    • http://lianbang123.com/uploads/files/202109082047283755.pdf
    • https://equator-maritime.com/userfiles/file/nuwabutejajabutixuna.pdf
    • http://ergo-logo-bamberg.de/userfiles/file/numuraw.pdf
    • http://bachova-terapia.sk/images/file/58276426226.pdf
    • https://ladangmimpi2.com/contents/files/75529834628.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe9c95d8c3.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aec6.bin
a1283b9d89996214af4b7511308d17ff26c87a04cf4ef5b0681d7a20ad81a50d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC6 9972 bytes
font_01_sfnt_off0000c4c7.bin
47e5dffd5db9afad5950eb8edf3d92d241918a22c8dc745a6b19038d9dbd533b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C7 15352 bytes
font_02_sfnt_off0000ec0c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 16792 bytes

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