Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd34357b535b40b…

MALICIOUS

PDF

90.7 KB Created: 2021-07-07 09:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84d746c6584b8842750ad0937a7c5b45 SHA-1: 0c7b5df29b0a69e061ef09d7a523b94ebd0d1163 SHA-256: ddd34357b535b40b5b93c30db94521d4cdd24516302157b131fa1268b75afaa3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external links is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://infrive.ru/uplcv?utm_term=concentrate+meaning+in+marathi
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/7fdb17d5c4108de002483db2f24b8936/5932232481.pdf
    • https://taevlingar.se/images/pages/file/posemokexabotal.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/bhdg9uep4phnhj4kou8vpilnf6/32480835229.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/3d38b789fc1ab0a65e95b393201c9b63/9131791580.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/9424db0acaa8a0744528ae507980c8b4/11476558315.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c9a361b53---gofujodutuvawevuvul.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/8ci824f06iv393f5jna63aqag3/26413493979.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/a3c77a151c81244e899d688d0df224bf/fezomatatur.pdf
    • http://wasserentkalkung.at/ckfinder/userfiles/files/82771978534.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/inn49ndtnuk4cs85kqa49p9ik1/56285119854.pdf
    • http://robertoantoniz.com/resources/original/file/pifeniviboxelerif.pdf
    • https://clifestyle.net/uploades/userfiles/file/22343936928.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bcbf8d766---lebifawufimobukefaj.pdf
    • http://movementlab.dk/userfiles/file/rezufamolelapu.pdf
    • http://headrepublic.pl/images/files/91118262968.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/lb6jatt9n3jnnsoqgskp0fjt3p/pepaxavopunixijewixuma.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b027f127f---74044164970.pdf
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/pifavagosodimokulok.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160801c8842510---8506587450.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608e138e22f0f---relololonajupapove.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ls1pdu94curb5hfc1cujl6linb/90639829215.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2fa5b7f71---32139863836.pdf
    • https://dodomacnosti.net/data/file/86721989246.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/o6d7s76iktoikgfogg264ntu02/siwegimegubawe.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3e2.bin
b7d656855261832704102f41f0e8684be2225992230349fae8f6e0ef69e19f94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E2 10496 bytes
font_01_sfnt_off0000eb93.bin
3d0c48699eee89a6728fda329a3f6c7eb59bb782d5080dfd56d621ea27ea0ba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB93 16676 bytes
font_02_sfnt_off0001034b.bin
b994252931d44b5726a596fc46736d8f9c6afa51fcf0c25c0e6995f9c85403da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1034B 2028 bytes
font_03_sfnt_off00010ca0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA0 16792 bytes
font_04_sfnt_off000124b2.bin
63bd8bf6c0e573e01e53611b7401703922d341ef514378a1c740af2ef59e6876		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124B2 22268 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.