Malicious PDF — malware analysis report

Static analysis result for SHA-256 7929b736865494da…

MALICIOUS

PDF

91.9 KB Created: 2021-06-30 05:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce6286255ee14de117f2daf5f63b7b8e SHA-1: 8afdbd60fba8d728b743100df754e0d477349f46 SHA-256: 7929b736865494dab1a783398d3fe4c987f9979c4258641a326aea0b37298c2e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically using a password-protected archive pretext to encourage user interaction and potential payload download. The presence of numerous links pointing to compromised WordPress sites and disposable hosting, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. While no scripts were directly extracted, the document's structure and heuristic firings suggest it is designed to facilitate the delivery of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://smidgel.ru/uplcv?utm_term=how+to+unlock+a+pattern+lock+if+forgotten
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab425e034f1---sijelupaw.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160db70c9b4c70---wotusu.pdf
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/62151691782.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc162d6a8a---81433460361.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b894665950d---jafasulapekuj.pdf
    • http://dolphinegypt.net/userfiles/file/4838576873.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607275ec1633b---jakanibuguwakuke.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c9d86ac73b4a5f0fe309282bb5ea01b0/81360259536.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/bi8b5aejt790t9ld2dtjmj83l1/jakexijorifikivule.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/470b18014d5841393e68647f481b6a85/tupozojovotebar.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9dd430152---bekepij.pdf
    • http://arablift.net/userfiles/file/21320610327.pdf
    • http://ms-krmelin.cz/app/webroot/files/files/51802943963.pdf
    • http://helderlive.nl/ckfinder/userfiles/files/29281315696.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780fd6be332---towami.pdf
    • http://allprintusa.com/admin/images/file/xisilaluru.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/b0d93d9f3cee66896019c7a41f7ed023/rufebesejaze.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/c4ffaddc21c942738ca3312a7001c14a/16122611898.pdf
    • http://ctyrkolky-gamax.cz/data/dokumenty/zeriwezebanemanun.pdf
    • http://blankheich.de/images/uploads/file/dofolanekujenusavonariz.pdf
    • http://daotaonhaccong.com/uploads/userfiles/file/kediw.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46f66d4e64---lelafafoganepejepojureb.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093b677eac68---riregudumu.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/3dd3aa5d1aed989b12927e1c1cb56fc3/10640771029.pdf
    • https://telewebmarketing.com/FCKeditor/file/pulelazirimujagorivopoz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101a9.bin
e71ac06792d43c814bf5ffee4b85d2305c2bcd4461dbff55c30c0222a181a5a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101A9 10756 bytes
font_01_sfnt_off00011a97.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A97 16792 bytes
font_02_sfnt_off000132a9.bin
1b61e25b2d33c107fb87aea1c5eac0d77af52e7bced9652b5357ae74c0119eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132A9 17496 bytes

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