Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c464cf5412cc050…

MALICIOUS

PDF

79.1 KB Created: 2021-06-28 01:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30be4a4a0ec3c5308d436fddb2088d2a SHA-1: bb584dc0423cee36192b9df9eab801c6d9434d71 SHA-256: 7c464cf5412cc050e5b3bd84040fd71e1e9d83fc804456f3f5bab279c5732d88
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The embedded URLs and the PDF structure suggest an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/95737910232.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760cb631eec---72316604349.pdf
    • http://www.yoko-ono.be/images/userfiles/file/89645421415.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/9136b742efdbceed1e30e8165c442aa4/jenisekejeruji.pdf
    • https://101doctor.com/uploads/ckfiles/files/60b2e371e827d.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f3f99a408---sidijesulezumuze.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/39074903784.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/0d7cb892d858e31303511ecc174c8d91/30057668540.pdf
    • http://maroba-zirndorf.de/file/xakakumok.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/bhg0s76phmhgs4tl23fn8nphsn/bakeletudu.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/q0bm9h9si9npvvc7l4llh7ck9r/268848541.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f7d2b0f4b---warutenex.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf9c4260c4---8066472686.pdf
    • http://btc-ltd.com/upload/file/ripisipukerasagokejal.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160987ff3bba80---foxeduzimo.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/pcecsuuv5mov2sq1b5gnkj2pqt/medurobifopawatevagewiz.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c857680403---kezajebolodotuvug.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c782e2bacd---5290439337.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f41a3b38d---dibadowedisekeberakelebi.pdf
    • https://kitapkapla.com/upload/ckfinder/files/lifow.pdf
    • http://dui-antidote.com/images/userfiles/file/72148612364.pdf
    • https://juniorclublivorno.com/sitonews/images_upload/files/73272482712.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d8ffafb77---76107093411.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=second+largest+bone+in+human+body
    • 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_off0000d24d.bin
34041c18850e74b297f179e02b69016c0c0bbdf01b5142926f9b35622304b3bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xD24D 16588 bytes
font_01_sfnt_off0000fcea.bin
5a518e2a68cbe9a795cc1714090900e82f34501897d571438a9c3122f9ce126a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEA 11248 bytes
font_02_sfnt_off000116ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116EC 16792 bytes