Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee295058dfe9452…

MALICIOUS

PDF

83.4 KB Created: 2021-08-20 03:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 11541802cccb6b44aa167b166911b58d SHA-1: d55c8147d58b92e7d27fd256d717cead5275f0d3 SHA-256: 8ee295058dfe9452fb633f181773ea290bfe5689fb9d2bb53abc0fdfe8bbc545
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that lead to potentially compromised WordPress sites or other disposable hosting, likely to lure users into downloading further malware or engaging in phishing activities. While no scripts were explicitly extracted, the PDF structure and the nature of the embedded links suggest it is designed to exploit user curiosity for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df4414e3dee---41593567969.pdf In PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/u7e96svqa90l24gkofrvpk2420/sajubatipunosobutupo.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/liwudemuzivibizuw.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160915eb2de9bb---22311892737.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/761de0edd74058e790466e9b6460b1b7/96548782826.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/89580116611.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/wanesenuwadejotene.pdfIn PDF document text
    • http://getem.eu/files/file/64100563293.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/kcbgm4apqqa14aip07gjsigfdi/mopafopagelupujabeku.pdfIn PDF document text
    • http://greenbrier101.com/userimages/6956209583.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e91d187518f---62369387942.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f0ce355f7---30309390238.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/d27541ee98ff4556c7491ffad21b2b26/noximoropaxi.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/49003134639.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/58135423316.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/dc76qibb0tv83304ui9v4jf908/25553585333.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/kowagolizefumogoguzaw.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16071f61c54224---xaguwo.pdfIn PDF document text
    • http://bakoca.hu/files/file/wopajevasagakokigafej.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/43cf739c4ab7b11ca1fc428724ef10eb/46462788996.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/d067e2e82416b716d434ad96fe6b1d5c/bepomi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=free+download+film+fast+and+furious+9+sub+indoPDF 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_off0000dfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDE 10984 bytes
SHA-256: faae4d1863f8b638039d16e01c961ab96b09c0ea60767054bc3caccb2c9b823d
font_01_sfnt_off0000f96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96A 16972 bytes
SHA-256: 1fd053d1f3cf48d88bcb49fcf4158276e855124f49a2b57fcb5673bc32f5f9a5
font_02_sfnt_off00012607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12607 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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