Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc054ce5f1e8960c…

MALICIOUS

PDF

79.5 KB Created: 2021-07-02 21:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cdef3857b62d50c990d4a7a2e74a847f SHA-1: 95e19398ff0132abee77f3ac256f7533e405b19e SHA-256: cc054ce5f1e8960c7f74ab7d021c0307c3637a00a27d5a0f869c71724c451970
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs, many pointing to compromised CMS upload directories, suggesting an attempt to lure users to potentially malicious sites. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://autoshiftbid.com/fckeditor/userfiles/file/dejovifo.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/ca65d2284da0ceeceb6525490a958756/vakimujuvuze.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/1d66ec3931c70072c7247958f5662c82/23370089038.pdf
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864c6c74f4c---domamisixumo.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/53035689366.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/k7d6fs7nq3h7f1il5hf32r52a3/10933816647.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2a4c9a433---17870378272.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1d924816c---4175096606.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/liru4q0v6ip0mrnvvn56264pm3/2912804861.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79aefee6f7---zimabosagapigelun.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091b24305369---xuzaz.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/2250d228a6ab668bba7ed1d5d14626a1/wazosoxadizenazavuwa.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/f5469j9d8g36sggahrj173kaj6/42945559948.pdf
    • http://caratow.eu/userfiles/file/wuduvatututonurinusowolek.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/8ecbbf341cc9a703a310d6fc27bb7430/57317348960.pdf
    • http://eltonltd.ru/sites/default/files/uploads/43146486707.pdf
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/66098681331.pdf
    • http://adveotec.com/img/file/80213125112.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609683c7576ee---jekowemuru.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf38dcead6---70195735328.pdf
    • https://solener.info/ckfinder/userfiles/files/25033431130.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6ada941aa---juvuzuvibo.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608cae571bc84---gifolumud.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/1621f23068c7b87c05340489ab5beb56/11450721313.pdf
    • http://nanobubblevietnam.com/uploads/userfiles/file/rubisosekukimovovate.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5446e50432---81068904174.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=words+starting+in+ad
    • 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_off0000d4fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FC 16792 bytes
font_01_sfnt_off0000ed13.bin
e9fc0bef2a31c56580eacd92bdd03cc965896c2919db589ce1891b639a09603c
pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 10240 bytes
font_02_sfnt_off000103f2.bin
fd085193207a16628883959a7e525152c2de9748a5f080b0ac328fb4ed8dfc8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x103F2 17260 bytes