Malicious PDF — malware analysis report

Static analysis result for SHA-256 10667baee6d2225f…

MALICIOUS

PDF

86.5 KB Created: 2021-07-07 09:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 955566abd1af12b3e2651dbd29896b52 SHA-1: da19176677b31d5be55b6ad490b9e9a3bf80f61e SHA-256: 10667baee6d2225f45368f77a01d4187c28e53cb564ccc77e53b60af0cf11e01
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document functions as a link farm, containing numerous URLs pointing to compromised or disposable hosting domains, which are often used to distribute phishing content or second-stage malware. No scripts were extracted, but the structure and URL distribution strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://betenenergy.com/sites/default/files/file/tojewazezeka.pdf
    • http://zoltysnieg.pl/pliki_wyswig/files/wovaxebi.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5eb74b2471---bunukos.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf97d38683---xilogerefaj.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fae3db631a---gexapuvi.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e95366574b---mazanovu.pdf
    • http://maasmartcity.com/userfiles/file/57347698099.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ab1de44bf---95802669097.pdf
    • http://herium.net/FileData/ckfinder/files/20210630_E32E5D5782E25783.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a269dc234fd---58498461778.pdf
    • http://huh.hu/UserFiles/File/teduvebezij.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160940583a1533---zizobizazijo.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/d78f90d71e6b97c0bf10bd7ee7dbd249/86599240431.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160952b1c941d5---86684104911.pdf
    • https://towa-aaa.jp/userfiles/file/lujanizamuriwuzeroremom.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160713797ddba3---pogizobivopafozapivaj.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607c467ea31ef---pawubufixagafuwipumuputuw.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d943812211---3410414705.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/b1e3d408ecc67c05988a41d4381e535d/wosabejomofipomijomidirer.pdf
    • http://ownlines.com/upfiles/file/66960199530.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/kd7kjesm2pk0ipq5h03ai659ua/87224857229.pdf
    • http://amtutoring.com/clients/865321/File/kavikup.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/da6b2db030e1b8b6e13ae07e8d92220b/11887501642.pdf
    • http://afgventuregroup.com/cfiles/file/xuvominubovo.pdf
    • http://jevades.com/aircraft/fckimages/file/taxujowib.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=5+foot+3+inches+in+meters
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5ae03bd18---83001941535.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabc.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xDABC 16252 bytes
font_01_sfnt_off0000f09d.bin
1813e9961fe31c233f11d8f2e7abbe5913e48c22adc04eb5fbe0bcab5078f86b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF09D 10600 bytes
font_02_sfnt_off0001089e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1089E 16792 bytes
font_03_sfnt_off000120b0.bin
583672201d5387f788ce46df9ff7a2a19c287fa078a645983029916f6db33bf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x120B0 16720 bytes