Malicious PDF — malware analysis report

Static analysis result for SHA-256 117164ed3a2f01a6…

MALICIOUS

PDF

85.1 KB Created: 2021-07-04 02:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b523bc9c6ca45443846973a5d9ffb898 SHA-1: b1b97b10bea922d5fd57edb11fb71142204afaa8 SHA-256: 117164ed3a2f01a62ac1736ffb88e9f318b8a9f247b73fd10dc194f87e3663c2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of these links and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

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 https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf0bf521f6---dorukobebukekotajam.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/mdhkb8gq10gve812mkvqaajk8q/vetobumuxukadiwesesux.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a54fdd4ef7---90079121801.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/7854b1ce639dd3e81f1900fb68dac813/dapodoxetox.pdf
    • https://verandapattaya.com/userfiles/files/65702670243.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076271651470---digetipup.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa0088507d---85260758529.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090569386686---fexizobazatuwu.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d02c560d4b8f4fb1c1bff28532f79cf8/zeguvitad.pdf
    • http://orderkiwicafe.com/uploads/files/zedivizaxe.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9355e3125---mewomigidadofedajufefuda.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f18f3a8cb---58821815223.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb01ac2ee1---ropibosipukis.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9face6e60---jokurajasikelirel.pdf
    • http://afghansolar.com/userfiles/file/nokasomomasu.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/ca34ab03684be069d5d4c94c1ee1333f/ditix.pdf
    • https://radio-aurea.eu/files/file/32441172910.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/tkkejmub1qe77u5cgcqd31b5nu/82875407322.pdf
    • http://nowyhotelik.pl/userfiles/file/47391170266.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/b607f5c3e6967272a164a49d63587a14/93959828584.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/snunpu92ru2gurn55ci67skb66/xamiterubogirivunutano.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfd523d52f---26496686330.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/63266227037.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/f58eb241545be75ba95cd3a3cc836718/xadud.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+girl+in+room+105+ebook
    • 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_off0000e9b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B9 16792 bytes
font_01_sfnt_off000101d0.bin
04478104bd6c3edbd6cb070e1fb17e54b4242f5c9e428efe2b37d4eeb66db086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D0 10628 bytes
font_02_sfnt_off000119de.bin
287024ba1e952c1f9262e8d925ba18cb326cb8bd944efcb208bc0cb8b98f6b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119DE 17512 bytes

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