Malicious PDF — malware analysis report

Static analysis result for SHA-256 118c346c22861578…

MALICIOUS

PDF

93.3 KB Created: 2021-07-07 14:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ef500bbc6c52795f5cf77e61a5618ae SHA-1: 4c50644e879451220b0f9325ff6a9cc4a566ed7f SHA-256: 118c346c22861578decf5e97f6cb994a992734530ab73ac22126cbc437f824c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting, suggesting it's used to distribute malicious content or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e081a111bc5---6568518163.pdf
    • http://innotec-industrie.be/userfiles/file/76025076038.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160859d1b22308---jevikuworosixetopegur.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/mshp4pi6le31r0601v0do87i63/57363763974.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/5d043477873b09424c8b1a4e675f18c0/69316642689.pdf
    • http://hasici-pristroje-eshop.cz/files/file/mejezobavovukefi.pdf
    • http://nitexprofi.cz/userfiles/file/zigeribunidepadodenebas.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6fd19f32b7a5dded36b37f6d11b19750/bidawovulonidab.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2df0af4f---85128072143.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098fd69345d8---69447669617.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/aip1tcana6pmm6f847v5vgilef/judutapetutexabevoviwo.pdf
    • http://tasteofruraleurope.eu/upload/File/31865902.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a31dac56c5---90419756024.pdf
    • http://tutek.eu/userfiles/file/41696824014.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcbaee8c4e4---30405541402.pdf
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607883340b1ca---ledezowaxob.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/8mr0lhvnl7cev76o33nuvmsn34/82846183703.pdf
    • http://myredm.ru/uploads/file/6684300415.pdf
    • http://kadernictvo-svetlana.sk/editor_uploads/system/files/nexefuwirufujuwo.pdf
    • http://gelateriacool.it/userfiles/files/xuvenavaj.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607531ddb6278---23422493407.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/2md2r49o4008eldi34iacdk7ra/33544160655.pdf
    • http://ozkayalartrans.com/userfiles/file/jefunitewuwazewu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=occlusions+intestinales+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_off000106b8.bin
8fa7eeabdbf48a033ad54332bd0eb6a7b0d7a901038adac3ba22539ca7ffdbcd
pdf-font-stream PDF embedded font (sfnt) at offset 0x106B8 10640 bytes
font_01_sfnt_off00011f31.bin
aae8e4d013ba99033ee8be09916e9b592f9a62919daf904f943d0f7f27b8882f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F31 19284 bytes
font_02_sfnt_off00014e75.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E75 16792 bytes