Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f69919c8a9dd35…

MALICIOUS

PDF

88.6 KB Created: 2021-06-26 05:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7236b773f6b89288c89f9ede2565bb40 SHA-1: ee3e3ff621e76f5fe28e7c58836a4db6fbee4ee9 SHA-256: 75f69919c8a9dd35997dd5d74eb709d85185f86d984cd9d26c9ea8c3c943091b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to various websites, many of which are hosted on compromised CMS uploads or appear to be part of a link farm. The presence of 'cmdqs02t48kojhbptlsrg7u2p/gozefopunagubovebagur.pdf' within the document text suggests an attempt to execute commands or reference specific malicious paths. The overall structure points towards a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5ukq8kbjcfnjssqsqj5ne0g1a4/12744964113.pdf In PDF document text
    • http://adamslakeband.org/userfiles/file/fuwupujufozilabitevar.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a1e5c34f5---papikarusidaxojomavogike.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/uccj7r4866gree54dftkrdffr1/39192503884.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/rinetaruluxebesel.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/ncmdqs02t48kojhbptlsrg7u2p/gozefopunagubovebagur.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7afdf18a7---8537120056.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/tulaxubuk.pdfIn macro / runtime command snippet
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/890329897e927c465c94404058fc7ce2/99180783604.pdfIn PDF document text
    • https://mnlex.it/file/rulopetagokelojet.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/29okm2ctbb0hc64u2kiol20gla/pusikumabofajatusa.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/57532791699.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/filofodobenalaniwosadumo.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b921ca298---towexemobobe.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/120e27494fdefc8a77a67ac86b317e3e/fadonotaporowu.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/30685379666.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706edab79bc---55152011635.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160733197ce141---miwip.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606fadf8cc7b9---zelusatemiwuwimebej.pdfIn PDF document text
    • https://peterdegendt.be/file/ligepalukulas.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/9911544047.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/85e721371ec300dc25262ee0403f2a35/wulede.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/8d5659f57e1b5783ae93fc88c34df490/fezazanagalebol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=newlywed+game+questions+for+workPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 17200 bytes
SHA-256: 50a8ad43d73fe4abc5fb29418387745f4b82f178b6c1bfb8fb70cb9af7d65fb9
font_01_sfnt_off0001235e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235E 11212 bytes
SHA-256: 164430eb8124fd217867bfd9c63368a8e4913f1dee32f27b2ea48eceb1c49ff0
font_02_sfnt_off00013d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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