Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b425f863d0bbfc…

MALICIOUS

PDF

97.4 KB Created: 2021-08-14 05:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4aa94636b5c7b429cce59e34d790468a SHA-1: 73c2e1ce1c7440f21dac1b58cfc7bc51cb15f651 SHA-256: 60b425f863d0bbfcb01a8ca7b3baeb36e66ba1286057028086a2f3e652133fd5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://ozari-ua.com/files/file/2264837881.pdf In PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/zorufow.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/12415540753.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/roses.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/piliwodezilijomawizi.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16117139bc2351---31086123964.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a143d1abe10---loxajomisolaxodasusuwud.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e524a546d93---45493697106.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///40643668444.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/da11d941db65534be2f857f4e4828bf9/zagekavinegigiduxujida.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160783a1a9a313---35792287988.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f678d3adb4---zokig.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075d20711f63---98228108663.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b280363ba80---wojepasujovivirabubavisa.pdfIn PDF document text
    • http://jsdarvin.com/files/83567819693.pdfIn PDF document text
    • http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/jivobozelibedixin.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/fadodun.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/77661510462.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a959dad2a2f---8279625795.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/9132ca44464f3c9b163e059353910826/16831826189.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd094035318---kagufuxilosejividef.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16094999df1944---6076516774.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/kojoj.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/lexidiwupowiwavidefowi.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/rakixamuxabubevik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=super+smash+bros+64+top+tier+list+2021PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF6 18308 bytes
SHA-256: c5deee260a5a51a1791d7bea70b81f3cc63a43fa23af70b63a7b6b98713621c8
font_01_sfnt_off00013cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000154c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154C7 1696 bytes
SHA-256: 28c5bcedffb0f63c0f18ed07264126f7c833899b916de9a351f9850be7cb6bae
font_03_sfnt_off00015cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CD8 11268 bytes
SHA-256: dbba5c6c64f99fb96a15e84d6acc6c92465479ccfd15eeaa856e3fedee913356