Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8ba8c0ebdbd76b…

MALICIOUS

PDF

89.9 KB Created: 2021-07-17 05:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a78ea6b15bdc8becb3f411c9c0943a9 SHA-1: f2c8de9d7e9c1ba20f2fb92df850f81e65e9f153 SHA-256: 1c8ba8c0ebdbd76b4feb4498cd1407a9f5c26c40094c3ff422dc77343c669e36
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely serve as redirects to malicious sites, aiming to trick users into downloading further payloads or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://humboldthighclassof79.com/clients/1/19/19f040aad945c40a0acbd79abd3dc6cb/File/vabitaxosepeluga.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7ed7ac55c5d8056e027603430585f0c8/18753198632.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e10895a36e9---ronukuveverido.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/56c8117d16c05f1d347b8d3795ba038a/6019602161.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/55018fe66825be11c28baad2ca17a6d9/zibamajatixuvofib.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/rgoflfk2s461tmnnpmihv7mgjl/46146665250.pdf
    • https://morganmethod.com/ci/userfiles/files/riraxefexudu.pdf
    • https://adasms.fr/userfiles/file/14555977277.pdf
    • https://west-holding.com/userfiles/file/49819931767.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8793d28a3---6163161875.pdf
    • https://gancza-yacht.pl/userfiles/file/jaleluwikotagobus.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cfd4b27b0---59269904133.pdf
    • http://re-view.online/fckFiles/file/92905965389.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160df4c956657e---nexifozopitesemovugipuvo.pdf
    • http://sun-tes.ru/files/file/fiweketulupimaguwikidagam.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/adaf5f54646e75ca649d7043ed17b9e0/31541978266.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/770ac7cf779696eb948c9f24de7b54d7/51077325136.pdf
    • http://shs1977reunion.com/clients/41590/File/safiwuwirukewilu.pdf
    • http://sl-light.ru/design/img/upload/file/remijubewaxe.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/d0rqh7a6mkaieko3rfomrs8ir4/63149134776.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/53decc1d5570494b0e0e3abc7ccc22e1/rivogisi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=meaning+of+airfoil
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000e7bd.bin
48baa3e359ba218cba6d15290b5433b1935c178276acb1b3b397b4d15885154f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE7BD 23232 bytes
font_00_sfnt_off0000c79c.bin
839b37bb594b63a53bca79af4c86b0b927a5f9b4df2c74c855087c6a4cbee122		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC79C 2168 bytes
font_01_sfnt_off0000d11f.bin
ffcce4b6dd96229813dc063da5dd8849b8d042cc56213bbe1d31aad38f93a43a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD11F 10116 bytes
font_03_sfnt_off00010fae.bin
ffaf672ef5aca4e9dca1a517a580d9ba3622d9082a1d88cc8743db2bad70e83e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAE 19488 bytes
font_04_sfnt_off00014048.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14048 16792 bytes

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