Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c7806b152c19ba…

MALICIOUS

PDF

76.1 KB Created: 2021-09-15 22:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: db357c44dc3d191918e3589bc85d6671 SHA-1: 3bc57444bf8e39d4f9aac14c5086aff467820361 SHA-256: 00c7806b152c19ba46f7b25c8c739ef2f9c7bdeaf2e275a90d5ab5e1fdf2907b
124 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised CMS upload directories, indicating a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier clean score 0.2255

Heuristics 5

  • 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
  • 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://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16135b4aecf124---66409959705.pdf
    • https://eledigitalpr.it/allegati/file/valutugevesunamorisido.pdf
    • http://pathtojanna.com/userfiles/files/19792907344.pdf
    • https://hondamienbac.vn/userfiles/file/gilozebokege.pdf
    • http://neodentpetrosino.it/userfiles/files/viketejip.pdf
    • http://bugskin.org/userfiles/file/natifaguvoxav.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fe94310a5---vusob.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d62876af96---pudijase.pdf
    • https://wemservice.com/ckfinder/userfiles/files/69189169994.pdf
    • https://sayurhijau.com/contents/files/moripomemixifijenunedo.pdf
    • http://otestmanager.org/club/data/userfiles/file/20210903131105.pdf
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/12645932283.pdf
    • https://agatanorek.com/files/file/3891998035.pdf
    • http://gfb.it/upload/fck/file/79527331302.pdf
    • http://controlsystemco.com/cache/fck_files/file/17393395286.pdf
    • https://anmoul.com/userfiles/file/13420669997.pdf
    • http://rovitek.com/userfiles/file/wuvomitusen.pdf
    • http://sk4education.com/ckfinder/userfiles/files/vekopijuxuzoburigitotamip.pdf
    • http://czpohledavky.cz/userfiles/files/48928464476.pdf
    • http://casavacanzesanvito.eu/userfiles/files/94465163931.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b0f69db69---71732737694.pdf
    • http://nhadeptannguyen.com/uploads/files/godavizogovoxupur.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d80e41e5d7---90465236999.pdf
    • http://gzperson.com/uploadfile/files/60640585877.pdf
    • http://www.greenfield-sustainability.com/images/files/lilozogo.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613059a623cce---29206988642.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=john+murtagh+general+practice+pdf+free+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e7.bin
1d6459f7fbb16e25861ef35aaa60aac838dacc094c998c7d2c8b299412ad46d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E7 18756 bytes
font_01_sfnt_off000112a6.bin
bf04e51c8bfbbcba29381785e450763f9a07bb72f1e9a7ad2d7a4f64facbc735		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112A6 11076 bytes

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