Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0f63355abea028…

MALICIOUS

PDF

87.7 KB Created: 2021-07-05 22:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e74716b074433bdb071146f3a23752c7 SHA-1: de4a4c812492d7465b26a32bf9ccbb10d70dfe8a SHA-256: ce0f63355abea028a8cf4bc7d7d785698eb6eae236b364e5fb743b2022989542
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely serving as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://medvor.ru/uplcv?utm_term=disable+find+my+iphone+on+computer
    • http://broadmoor80.com/clients/866172/File/60788339377.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a90a60a5eea---27006153326.pdf
    • http://wisdomtours.net/upload/file/medono.pdf
    • http://www.yoko-ono.be/images/userfiles/file/98597078975.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609471bdebed9---66157655420.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608268c941eab---8561951877.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bc29811f8---90128229686.pdf
    • http://yuanyoujie.vip/userfiles/file/wababetugalidasalozedawab.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a743a7199e1---jexebomusadutofenuful.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb5c96b0cf---wizemerifemugateviguxebe.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df523c1506---pabexolomedurew.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160bb392b71615---67160842077.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/cae6c1739db5419abb25262b1d2d2c16/66346437493.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/9571cde6fb7c769e7f5bc96ad03b7ad6/40230965337.pdf
    • https://ewt.cz/res/file/179355694.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d7e2a9db017---jonunos.pdf
    • http://ferrocom-spb.ru/userfiles/files/suwosominubib.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/9962554c3e074a0e7d62ff8bc2445429/jozoj.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/tvan4ra3g2926vfli85ugeq5qk/56189978127.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/742270881d6175d6b9a012517e6d86a2/liwaligemomusujun.pdf
    • https://pjkconstruction.ca/images/file/42924370789.pdf
    • http://jdhs77.com/clients/58520/File/giwadevudazejatera.pdf
    • http://s292376414.onlinehome.fr/datas/imgmail/file/81396665299.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_off0000f301.bin
5a2ea6b1900b2828d264e3d150a8b966d381f5d2556c1622a9ee09dce6915191
pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 11240 bytes
font_01_sfnt_off00010cf3.bin
ce2f7337ec0ba64ac82f6aeecab1544b4f16fdd4216a9ffd5162f332fa1111a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF3 17044 bytes
font_02_sfnt_off00013957.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13957 16792 bytes