Malicious PDF — malware analysis report

Static analysis result for SHA-256 51747a05b5536570…

MALICIOUS

PDF

89.3 KB Created: 2021-06-25 23:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d295cbd8761b11295e1a36ef83b50945 SHA-1: 4b08c995817024c842ff7ff3d26af4c543d129aa SHA-256: 51747a05b553657055ea2f5b3226a09715d2ad0573b523cf09ba109c7d069764
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to PDF files hosted on suspicious domains, suggesting a multi-stage attack. The presence of these URLs and the malware detection indicate the file is likely part of a phishing campaign aimed at delivering further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://akita-inu.lv/www/files/files/ditogisuwaxowowe.pdf
    • https://noihoithanhtuan.com/media/ftp/file/kajezumumutonag.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c387ac3e29---mimat.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8f34b5d2f---butanibon.pdf
    • http://pobierzplik.pl/uploads/files/21804014087.pdf
    • http://www.haztartasigepszakuzlet.hu/pics/file/nujodigobirugedije.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb8940ec0f---fuliwaxesuluvidojawuveja.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c09d7410bda---81733373261.pdf
    • https://maconlux.lu/userfiles/files/basokamuwurapa.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/991ba0df8cda224cf4e7ee4ea03a1aa0/62686718866.pdf
    • http://leebyunghun.org/new/upload/board/files/8807391802.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/a24elghd59m7bsuhks9vuc9ok5/72070132633.pdf
    • http://historia-bfured.hu/userfiles/file/19445432698.pdf
    • http://msamericapageant.com/clients/873634/File/92835745409.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608323b7618ea---tanotivajof.pdf
    • http://maychamsocda.vn/images/userfiles/file/vufamemagevin.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/8uc24lbgjnuvg15ene2ff7t1ek/83709667009.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/773521f39175ee67b251e45a972ac06e/benuvusu.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160979e27b9984---2785893755.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a3312a394---gidovinurezag.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074111cd4cff---15984761909.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/av8du1e0h3aveocaa4kora7onv/50548256242.pdf
    • https://alshamiltrading.com/alshamilfiles/file/megotosid.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/32012db088abfb69277f3706149c7f7e/70635022747.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee2c8bc3fa---58418703198.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c3d84225c8fab4319768196d6a431479/zelufativipugi.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/o6ttvh911mibp5n0b85ldfq4lk/wefamasolunivosaza.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=dissolved+oxygen+in+cold+water
    • 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_off0000f9b2.bin
c75043244573f585d754af666e68b4271ed7c2d5362cd0c15735b01f31714e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B2 10912 bytes
font_01_sfnt_off000112f7.bin
5cff1f76caa1fc690216e4ef14bfadfb50a5c79326412b62b2aea7478fb9cfc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112F7 16580 bytes
font_02_sfnt_off00013ddf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDF 16792 bytes

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