Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e834b492c389dd2…

MALICIOUS

PDF

95.2 KB Created: 2021-07-02 01:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4fdf5301cc1ae2ef497362104fe95017 SHA-1: 9e52c0d57c33463576e56f88920b3cd3863d398c SHA-256: 4e834b492c389dd2830f9fa3537f7d84e943f8256f1b29237d63ff8e120c9830
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://huntic.ru/uplcv?utm_term=mk+stage+fatalities
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/90d43893c75b3e86d8ab00b0232e0a1e/nukofeketas.pdf
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/c3c37aacb92d2947022dec1809e5a634/36654539052.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/3dc9f7ec0fc7eab67e2cfdaa936b614d/26375939569.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080881adade2---ketexojifufosu.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1908f7342e---15330573732.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/2dd9bf5b15247cd0a5498b9d397c6ed7/19270427745.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bbaba40ba---tajodexotatido.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a278e3b80bd---relale.pdf
    • https://rybczewice.pl/userfiles/file/63344839540.pdf
    • http://phuocthuan.vn/images/pic/file/8673925273.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1608a680312201---gisowokobupitofi.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f292f35a0---49589603473.pdf
    • http://canvangdientu.com/images/file/labazijadedilumuxeb.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b78b046e04---zakozukiva.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080994e2debe---womenomisixizowagugovut.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c1022cce1e1---rixubimin.pdf
    • http://oishisushigd.com/uploads/files/botuwes.pdf
    • https://kisikana.hr/userfiles/file/kamoragudelipunulu.pdf
    • https://cristalensi.com/public/File/26239093048.pdf
    • http://gyobel.itpublic/file/xozexitezodivabinuv.pdf
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/85940992917.pdf
    • https://elsadaulte.com/ckfinder/userfiles/files/kumirexabonulararuzevavut.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33914072ef---sakexepabanosileki.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/edmgrh48pmdmjcddnlc2p7afna/84368967688.pdf
    • http://www.dismaplant.com/ckfinder/userfiles/files/patulunide.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_off000112de.bin
1c41efb7003ca6ae0cf9215ed960a45ef29604556c993d9701447bcd6cc180b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112DE 17588 bytes
font_01_sfnt_off0001410a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1410A 16792 bytes
font_02_sfnt_off00015921.bin
b461686a2a9526a01a7e949cdc29d2e217df83f722f32bf7059b3f1c47d8c24f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15921 10152 bytes

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