Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ee57d8b3f4f87f…

MALICIOUS

PDF

502.5 KB Created: 2022-05-28 03:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 52df0ccb362bb2dc74683af084797880 SHA-1: e2a1cf6fccef425d5016b312c765aee28954a212 SHA-256: 88ee57d8b3f4f87f75eb1ee96537d184a51e068e57e71a65c20353e5faf3d716
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not meant for direct user consumption but rather as a container for the malicious link.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4414

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://colod.co.za/XSRYdR1H?utm_term=estimation+and+costing+mcq+pdf+download++2018
    • https://toxodomof.weebly.com/uploads/1/3/1/3/131384531/gukulobupiwetab_jumagurafe_vexarudivixugew_sovixunapakapup.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/162859a6bebdd7---muwudiseri.pdf
    • http://hosma.net/upload/files/92487745426.pdf
    • https://fibekebirotuw.weebly.com/uploads/1/4/1/4/141404176/winugubuniloxaseruf.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/931ec8e8a2d5a55b77cd90129ce6f407/54902255730.pdf
    • https://norusefoxoji.weebly.com/uploads/1/3/0/7/130739223/b6a383.pdf
    • https://jowanubeso.weebly.com/uploads/1/3/5/3/135399775/1a0ab1a3.pdf
    • http://cartopack.com/Images/file/95779397840.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1628091bcea8fb---62300317882.pdf
    • https://mk-sito.it/uploads/file/38729112340.pdf
    • https://kikurebimeko.weebly.com/uploads/1/3/0/8/130814200/3922011.pdf
    • http://advocaatindex.nl/images/uploads/gejasufudewi.pdf
    • https://sifijijesibedu.weebly.com/uploads/1/4/1/5/141507566/7896052.pdf
    • http://elmbys.se/kcfinder/upload/files/39680957846.pdf
    • https://phatgiaolongan.com/upload/ckupload/files/wojilukanodanitigad.pdf
    • https://toxesuta.weebly.com/uploads/1/3/4/5/134510581/8779280.pdf
    • https://gozowejikagigu.weebly.com/uploads/1/3/5/3/135345496/mogesemekamax-gifejowudejemip.pdf
    • https://zojadirevu.weebly.com/uploads/1/4/1/5/141598775/5859224.pdf
    • https://reravonox.weebly.com/uploads/1/3/1/8/131856904/2669221.pdf
    • http://iks.premoweb2.at/userfiles/file/50169844785.pdf
    • https://lojepelomilune.weebly.com/uploads/1/4/1/8/141835096/eb43a5c0add.pdf
    • https://tozizixeb.weebly.com/uploads/1/4/1/6/141692920/5603513.pdf
    • https://kixovomez.weebly.com/uploads/1/3/4/8/134868331/siwusadolir.pdf
    • https://kpk.1c.ru/admin/rc/ckeditor/kcfinder/upload/files/78864765662.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_off00076a75.bin
fb4af7bec5722e709871ab528e7c5183e996ee888ea3c802247f5bb7d0799ed3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A75 11448 bytes
font_01_sfnt_off00078519.bin
41e0b779ca61cb0435ca44a41de7dabe1c10390178901c24de47d8c4e0294960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78519 17680 bytes
font_02_sfnt_off0007b2f6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2F6 16792 bytes

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