Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba9e940ff822bee…

MALICIOUS

PDF

132.2 KB Created: 2021-07-20 12:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9812a678209573ebda20ee4ad36c327f SHA-1: 083a63cf79a46e944747213797be5b50fe77c120 SHA-256: cba9e940ff822beef59802a9e33e2353783c833881ddf24bca7f5fd0c0b096a7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 https://drticket.ir/basefile/drtiketcom/files/33842611573.pdf
    • http://praguetransfer.com/files/file/sejikutifogug.pdf
    • https://dm288.rs/slicice/file/9883387547.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/722ce2cb9fed9e78f2eb2e3b9e434b1e/1386687805.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085ba7f5fd24---togajas.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16098af927c0ea---gavogivomed.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/6a8043245e3a9471abc5e218f951324f/novavesawaluvobuvefisom.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b2fed7db1d00918ec6b86da5a7b112bf/tupavixid.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/da2e31e8fe8c96040d5d5463320b3953/gapusabotafegebejemimos.pdf
    • https://jurad.eu/files/file/9990446790.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/ec405ac306f08fe953e3952d5d787dee/37723769592.pdf
    • http://jikaramen.com/uploads/files/53829955142.pdf
    • https://jagamimpi.net/contents//files/nobudumev.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/c0952ea8b2df9116e525f151e13b348f/71118433713.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c29801b0366---95918898001.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9ae3181e609ab3f56c429ddf29370cba/34264445056.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8fd3bda6b---jivomivar.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/fd611db2deee5d7e15b96e00cb0a1932/14353876116.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088c8e01cdc3---wiziwep.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6b80e587d---giderupawo.pdf
    • http://footstepfloor.com/upfiles/files/gezavunesadup.pdf
    • http://star-transform-moscow.ru/uimg/files/96850039513.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0649d6f01---sofafajevaj.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/1f81b22f5bcbf049b68766b9375cd491/45325132624.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=in+which+decade+with+the+first+transatlantic+radio+broadcast+occur
    • 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_off00019f39.bin
8fc0fba82291bd093a2a8eb0cfc8d955073b78cf026b89ddad4863f04d18fa0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x19F39 19804 bytes
font_01_sfnt_off0001d151.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D151 16792 bytes
font_02_sfnt_off0001e968.bin
9dd35d8aaa460be7f013db8ca5fa0734e7806074ca20165d3ebfdef44f5c4a31
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E968 10848 bytes