Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8aed039c92ba2f3…

MALICIOUS

PDF

90.4 KB Created: 2021-07-01 11:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0968ce810c0d50cb348c03200b00dc68 SHA-1: 6d8e0328808a5df34919210c97ac4fac6c4456c9 SHA-256: f8aed039c92ba2f3c25af89e8f71a0647f5519da9b4ee33f5836e5f903ca99eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to malicious websites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://laborke.ru/uplcv?utm_term=cheat+engine+stronghold+crusader+2
    • http://chalappuram.com/userfiles/file/foxow.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/711de2f3d844752c90f1aaabb436ea82/safunupixemobajuwovoku.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/62998821ff7ad381580f59a02e9a98be/xidemiba.pdf
    • https://sasalidayanisma.org/uploads/file/16842984188.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/0djdnavnl3jubn7p5pgcbfl799/50070353040.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cb143153f---fekugeto.pdf
    • http://romanakladatelstvi.cz/userfiles/file/54360937200.pdf
    • http://madang.eu/f_pds/fck/file/786339713.pdf
    • http://giustofiori.it/file/75934366198.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e634932a5d---peselulad.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfe69a9c65---rozanidigadutamuwo.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9fe5e7af0---92485392215.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/e3a9646e1b8309f0a718626b1e7b0a9d/kukugatadegapugigotanedig.pdf
    • https://bajrahrs.com/userfiles/file/mopinusev.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3a7602d74---fupudowazogovure.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607488a32be5f---tonitojepexigujag.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/990ee23ac910e1823290269db8702524/jefigijeboruxijis.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54abe2e31b---wizamosomibipimokeni.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813b89df09d---digodilotoriwimox.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/cd8ca195e6a70866157f3262bfd8ded3/zidewotetunikexukug.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160845bf52da59---zunojademiliwil.pdf
    • https://ubranni.com/uploader/files/74587593320.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27fd9e61b5---96115373048.pdf
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/049189c94ed0b1f0d3e6b8099cb48e2d/11262151647.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e78f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE78F 16792 bytes
font_01_sfnt_off0000ffa0.bin
885b9024a80bd539ee88f4c17c1e1fa3cc6dab475ff5b740ebf17c73a317c9ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA0 17112 bytes
font_02_sfnt_off00011882.bin
98526ef6a4d57909c2ed7055b3f427b4c54b8b07d8caf2c98a259666484b2f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11882 15872 bytes
font_03_sfnt_off0001410f.bin
bf101c80e3e80e9324099693da00aabe284a31ec5f6cf184fd2742e4bee1c228		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1410F 10900 bytes

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