Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c9d45a43842cce…

MALICIOUS

PDF

85.3 KB Created: 2021-06-29 04:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a56c2044e0efdeed22c71fde013a0804 SHA-1: db86c26e20ec4bbce8a8295d5943066d9eed0850 SHA-256: 34c9d45a43842cce1d9d992f9a87fbfe2e03d1da2820420c6619ae36d0a31535
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on compromised CMS platforms and disposable domains. These links are likely used to lure victims into phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maremio.ru/admin/ckfinder/userfiles/files/vibikafesalejarotemazez.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/3a2107854c11da07a58d2ae469553e1d/6301923987.pdf
    • https://anmoul.com/userfiles/file/92993919838.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160760569848f6---rikiva.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/b9751745410f5af07c9d057c573e813f/28377661189.pdf
    • http://fritz-fahrlaender.ch/download/lafib.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/o9gvg0s91p6tnmnilamdkfhmg7/wilijizafofad.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f57127c4ef---62918115234.pdf
    • http://yilip.net/userData/board/file/dumusowegu.pdf
    • http://alexlunacoach.com/img/editor/file/bibogi.pdf
    • http://vankouwenenmastop.nl/UserFiles/file/40467493094.pdf
    • https://summit-christian-academy.com/scauserfiles/files/pakawebododukuwuwe.pdf
    • https://queensflower.nl/clientfiles/37829245249.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608600d305750---3955999841.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22823bf3c7---mukutato.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/1f2370e922b8b58bd5f95cece407dab0/34594776560.pdf
    • http://accessiblevehicleservices.com/userfiles/file/63910868217.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c507cf5bd87---5505547043.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1609102706e98a---mosibojogax.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d188eda726a---rasubufokewedemoralarax.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/eaa274c322d77b74ce552ce7b458f07f/piguridibiz.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/0eacf206ae89c1d9fb8360662dddaba5/1351540816.pdf
    • https://jajugroup.com/ckfinder/userfiles/files/jamesisarurebapirujal.pdf
    • https://uleiuri.ro/userfiles/file/77925394896.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b587d7118---vidunudalixijowoximazowo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=stainless+steel+value+per+pound
    • 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_off0000ea87.bin
7d3a5e1f3d6fd42be5faadd82d43f8a725c60b23d0b67cff3e428f8a77016cda
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA87 10628 bytes
font_01_sfnt_off000102eb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102EB 16792 bytes
font_02_sfnt_off00011afd.bin
46ef04ca8558edf3ce21276c589542347b2ad9db535b1e1042e71e36b4b9429f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFD 17172 bytes