Malicious PDF — malware analysis report

Static analysis result for SHA-256 2269f99a35ee0685…

MALICIOUS

PDF

85.5 KB Created: 2021-06-27 12:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 47f99c2ec2b48eceed767d58e5e31af2 SHA-1: ca8dadd1513d2326579bf52f2657905b1f633ce8 SHA-256: 2269f99a35ee0685ca898ba450acb3b4c3e0957ec5a2605074ce81f0b8337905
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised CMS upload storage and disposable hosting, indicative of a link farm designed for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary goal appearing to be directing users to potentially harmful external websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • 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 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://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/6lsqce75mrnlarilshr3retst6/48732931898.pdf
    • https://conexusinternational.com/ckfinder/userfiles/file/bimonevelubawotep.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c6384bb8174---galixoruzu.pdf
    • http://sushikyototogo.com/uploads/files/89879967049.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607153b62c273---95760866857.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f724983f32---93414946228.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/18855908d3fbcba077048e8677baa13a/79363938788.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/31246155214.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/valefivexumazukuvoga.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/18293ad0850940e3abf1a84019175ee1/fakodarobilofoduji.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/9dc764eed18aef863199d3ffcfbb3ea2/balexiwa.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608e90ffc403e---rafukawavoxikos.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/33895b7e68e135289f0a134e3f82b1f4/fapamerekedewe.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096bc650a78d---kolekewema.pdf
    • http://moristas.com/userfiles/files/2665803368.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fff5dbc2cf---68251783831.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/58paqa9ff4643iefahg4svnn50/41289160409.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d60ca019a7---18326054539.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a58ef6bcabf---wuvizokuruduse.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727c053b2c9---23241147252.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e49083c1d---guzulokevajanemew.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/0eedeb37d3f3ec68c6836f0234fc20da/97520970494.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096037060d95---lejazexojedowebe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=south+central+texas+regional+certification+agency
    • 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_off0000e654.bin
d436ef36c7bc058cab0b9111a0c1e991d6a342ddf289d020a4eae726c6bc4143		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE654 18072 bytes
font_01_sfnt_off00011684.bin
985c9dc846d8eb532080716901c134586941bbfcf3afd577155d364ac020a6f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11684 11004 bytes
font_02_sfnt_off00013011.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13011 16792 bytes

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