Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bca0bed8126ea9e…

MALICIOUS

PDF

85.4 KB Created: 2021-09-06 17:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7a5384a3b533e57005f5bf495d6bea28 SHA-1: 122a1644e1e7500860b8050021e8d08bfc42cedc SHA-256: 3bca0bed8126ea9e234c54e6e9aa8523850aaa10962dfa76e5452ccaa12d5ff4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of a 'Macro/content-enable lure' heuristic indicates the document likely attempts to trick the user into enabling content, which could then download and execute a secondary payload, possibly via embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://archism.ru/uplcv?utm_term=jurnal+titrasi+pengendapan+argentometri+pdf PDF link annotation
    • http://classtool.info/upload/files/povironuvufidez.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/tilikemujaxatomekakuxunuw.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/10003460664.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/7241d5bb64bd20150413639bc9569a5b/82297279711.pdfIn PDF document text
    • http://lucann.com/Upload/file/pawefafalijuzadeneli.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/9289808747.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bf3287d76---badivasalagideminedufubit.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/mowulisexadeteramararojo.pdfIn PDF document text
    • http://dogable.de/userfiles/file/12480335770.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/busixanoxefuv.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/xazumevutikitigopikuteluz.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/sibigalazitotamina.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/4po2r5mjbtupq97ogg1s1l6pf5/54948188498.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2ebe10f84---tetujudoso.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/195b6de0ebddb8bf3a6a5712723cc577/bezemegisaf.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/35842898033.pdfIn PDF document text
    • https://spiuruguay.com/ckfinder/userfiles/files/20857200126.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/22496788251.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/31784217015.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/83064829051.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/nit2p3jtutsqriu2kno68tlbkv/dumitigo.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/52060332667.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/dawuzuluvigerufexebatujis.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/7e12a743b8f18bf9c6a984d0b6d44296/fadenuvalax.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/36740175066.pdfIn PDF document text
    • 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_off0000e56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7E 19160 bytes
SHA-256: 5d636b93a44e4be24993b0bfa2dc865f907dfc89e99db1372cc9feb8d79b3e44
font_02_sfnt_off00012eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EED 10932 bytes
SHA-256: 9617ff81cbe7dfdcc9f6b91f08e7c9da70131d567bfcedef7a265d065534d4a2

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