Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e97468edf0432c9…

MALICIOUS

PDF

82.8 KB Created: 2021-07-05 03:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e2585a65e3ea45dff891eb3d3b782c9 SHA-1: cf14277331a9a4d946f87f972fe4e8f2c36a9494 SHA-256: 7e97468edf0432c94acd4aa3098ab3bd0c6d6ffb585cbeca7ae7ed7c92c4662e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload storage and other disposable hosting sites. These links likely lead to further malicious content or phishing pages, suggesting an attempt to lure users into downloading additional malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a379ef21f97---25683946986.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082eed9424c8---11528157774.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085d0c4ab837---binijidaragirawufifuz.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/ppijg19bpd1f5qsdlj1ha37r7b/kabuxorajudakorodiritoxa.pdf
    • https://lawyerupsmart.com/tempimg/file/25044028688.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/d0091503c718b81ba8ac562e48d1c417/paxogugoxojupal.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f512afe78---bilalilirobiduxafoj.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e47f289b97---sagolupegilutaliloduv.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/89d2fb203cd6cc53996516722e297332/babopeluwun.pdf
    • http://kondicionery-domodedovo.ru/upload_picture/file/sipasarilazaviket.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/c7fe36d49124ad2ebd32e722e9ffc7b9/tawudixug.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d210da03cf---xivuluvalu.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607508c5a01eb---jexosixokozaniweloredura.pdf
    • https://ratco-hardware.com/Ups/files/28638818883.pdf
    • http://ac-kenigsberg.ru/files/file/mudalezamimewe.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/e33e025cb61c1cf4f3e60d2e7fae7271/97652388809.pdf
    • http://rld-carbon.ru/file/zupegananewotufopo.pdf
    • https://faktxeber.ru/resimler/files/11914997948.pdf
    • http://inezorviskids.com/clients/37546/File/tugamigotatedipudikofa.pdf
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/pufiwokezapuxawifo.pdf
    • http://solamsys.com/userData/board/file/67829086264.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/9ad2196cb9a6c504640b4e7d45b5ebf6/34800906352.pdf
    • https://ecohort.com/userfiles/files/gerurusimapifirugagid.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/426b873f9c94be4fd5ac4dab5bf68ae7/33972698254.pdf
    • http://reicar.dk/userfiles/file/kezorurowo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=converting+pounds+to+kg
    • 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_off0000e167.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE167 16792 bytes
font_01_sfnt_off0000f97e.bin
955f901f8579f3de857fdabf02306eb1dc58e085166f01515cbdb2174a85b9a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 10648 bytes
font_02_sfnt_off000111da.bin
ca9518e4cfd2d14cad50581acc264f7ff8fb9cee7e0bc5773017172cb1fd82e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111DA 16896 bytes

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