Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b830a65778bed5…

MALICIOUS

PDF

86.7 KB Created: 2021-07-18 02:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5b51a2844ee84facafd6410cd46025e SHA-1: 120fc82a5b07f0b65d4d31c98f1bf1a2bfe7e5f7 SHA-256: 08b830a65778bed5f7f22ec6b0e612a8c3459f97175f4191a4d3a82c14e2ee9a
204 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 with high confidence. It contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The presence of JavaScript suggests an attempt to execute malicious code, likely to download further payloads or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://attlas.center/userfiles/file/wetujigawamo.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/4f86e1c0762b9b6dde539b2e0d2d47ea/likumuwefiluwe.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c284bde25fc---61411196046.pdf
    • https://harkakotony.hu/UserFiles/file/rupevoxutodug.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/25022048ddc1576c5247e77ced751915/xekuxizopusananuvu.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/c89058d9889446faa00319cae60c5b01/51441793450.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc70e092803---ponugojumobapoguve.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16083b87f4bfed---jisalolazewazinurabuvenen.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b411300d6---gorupanevogasenebepe.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/mbvaecssl7su7dueune6lh48c4/49105757713.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082e76e16d41---mokexadanuxuwenifowenudov.pdf
    • https://juvelyrikoscentras.lt/Files/file/99493591599.pdf
    • https://birgatour.mn/js/ckfinder/userfiles/files/pumetikejekulufubovov.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b33cdbe1d3---vexefowibuxaxilirib.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b1f395de56bc5a50fda0ae1e269104aa/tozekatol.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/94cca7729e6fa458cb3d6ef88c3a6b54/7547027347.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41ab8b8c8b---46779455385.pdf
    • http://dlikefulproductions.com/clients/875850/File/83372729681.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/pkbg62mducvroltirqd7m2lu2k/pajojefekuxokuga.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae0fe3898a---boxazesixotolepaf.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/ac574dd30b39527110f648064e5fef8f/91199855519.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/5lv6rncmdl2hs99ntl51la0ek2/bezaxikolitawanes.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5202a3b2a6---5044622142.pdf
    • http://praguetransfer.com/files/file/lugetopaza.pdf
    • http://curry-box-deluxe.de/userfiles/file/26682140774.pdf
    • https://schreiner
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=bacon+wrapped+eggs+in+muffin+tin
    • 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_off0000ea46.bin
3b064fcd2dfd5f97c2c6d46b9cd85d262c49b9a907b75774e8079b5032b5046f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA46 18084 bytes
font_01_sfnt_off000119ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119AB 16792 bytes
font_02_sfnt_off000131c2.bin
0f61cdb8893e252e02ae8c4626a451e4d765f66c573e5809a5029d23a01fe494		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131C2 11156 bytes

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