Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ddef5c3c375091e…

MALICIOUS

PDF

88.0 KB Created: 2021-06-27 00:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74793544a54f589bcafcc6d1a931a6ec SHA-1: 8472b3d23b08d2ce4538e6ef4a2c0cc045a7d572 SHA-256: 9ddef5c3c375091e88332166fa2040377d9e6b76258cc3010007f3b364a56087
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The heuristic 'SE_CALLBACK_LURE' suggests a phishing or tech-support scam pretext. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead the user to download further malware or submit sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pixomot.ru/uplcv?utm_term=how+to+upload+documents+for+calfresh
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/qphec4s9g9ghoa90gd5t0g9q09/zizusubumukabijamaje.pdf
    • http://riph.pl/userfiles/file/nodipozunafumogikoson.pdf
    • http://asupuro.com/upload/save_image/files/97044333043.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/e654522f7ecd28c90db48c84064443a7/fofedivawinewizixe.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607434ce01601---15225291745.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/954226a71bfeedccb4230c041ad74741/48256740792.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1670ed930---wozixolanifopugi.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160780a9669541---51739209865.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/o4u4ojgk12r14o6l1m2atlbi0l/fenigupojeduwun.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/2b16tdkin6kqt7q5hdvnhuq1mu/7626057583.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb901ea391---81278734044.pdf
    • http://bernardthevenet.fr/ckfinder/userfiles/files/pokadegim.pdf
    • https://annjulieskarpmo.com/userfiles/file/13180280880.pdf
    • http://ecovn.vn/uploads/news_file/98224602159.pdf
    • http://ztkammer.at/uploads/file/zepit.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea373cc398---30418493305.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/de17bd2a3bcae184a91517d373353be8/tamotalapavisuvis.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/c1e163d89299f4fa68e3fb32d27cad9d/83857997034.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/56du5ttnh4kddg51evhg7ekeoa/71205141570.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160842fc13e3c8---6602903780.pdf
    • https://west-holding.com/userfiles/file/31309778437.pdf
    • https://lee-trading.tw/archive/upload/files/maxitazusos.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/uvpasftth27668bac6nekgnp09/zafiju.pdf
    • http://vmkmsz.hu/userfiles/file/manubawe.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/68c5c58921c9a7ae119e977d39a18744/32500184375.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_off0000ee7a.bin
eedf3a621d695ab0c7902e8ef1557e5dd4f5ba39589efc937b1a8f920d10c606
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 19720 bytes
font_01_sfnt_off00012121.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12121 16792 bytes
font_02_sfnt_off00013938.bin
54a62cc2fe8d72421f07a898e9655136afc51be9e473527f83427e011d418d2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13938 10968 bytes