Malicious PDF — malware analysis report

Static analysis result for SHA-256 8374d9f5c900523e…

MALICIOUS

PDF

91.2 KB Created: 2021-06-25 20:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 677ec9c6bb41456300445654d816b09f SHA-1: 6d7632ec66b7a8c886165abf95840a0bb3422c09 SHA-256: 8374d9f5c900523ec09c2b1f37970eca4cfd632862c605cc6d70af208821f3d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive or infect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://smidgel.ru/uplcv?utm_term=letter+of+representation+meaning
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/71aab1644812935ebe8d93cd9c371bae/robisudolosixixefixuf.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc31a667e8---97276938973.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16097cddb8d358---wuwus.pdf
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/zobivu.pdf
    • http://laclonghotel.vn/upload/files/gusususawegakonitap.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c400373ff6---60455248475.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/to46dfga54kjhgkund8q0a8r15/25134512373.pdf
    • http://angarakshaksecurity.com/userfiles/file/22233116630.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160883b5c70a69---pedegatefiketapomifeso.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/cl15dkonukputg5jgvd0m7r4db/kawetufulibevil.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607083172d242---mowoselavezin.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709085dcfdd---67706937186.pdf
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/49578057818.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/8b8cf1c17327833dfb8c7e9bea2bb00c/450661158.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/b0599b6357d21047543d34baf45d3f39/46982315094.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/amprdebpk9o39ooea9kmoukonm/88260885903.pdf
    • https://emmaushuis.org/pages/gegigalimo.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c96e3566a1b---sozadaramituronixevigi.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/d3b7e275a7e556b5165dcba514768753/gonefevavegok.pdf
    • http://popmetre.com/news/files/kaxatukumonawavizoke.pdf
    • https://narimasu-chintai.net/jcfiles/file/segal.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160c293653294e---83046351841.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b796348176---54606602725.pdf
    • http://project-lovcen.me/userfiles/file/zuvavakago.pdf
    • 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_off00010296.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10296 16792 bytes
font_01_sfnt_off00011aa8.bin
514f3b112a3c7c6a2f3adcbf4acd60913b2aa3b8083577f8a2e6a399b5f47c47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA8 17056 bytes
font_02_sfnt_off00014732.bin
f42eb6b69ebb63b4b903c79ca689faed98c796eef7cb65b0140699ec46665d9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14732 10612 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.