Malicious PDF — malware analysis report

Static analysis result for SHA-256 0718581e07632642…

MALICIOUS

PDF

94.9 KB Created: 2021-08-07 14:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d0a1d90b05fc1f93fa9a6755513ea378 SHA-1: 26073b31637b54416e46f530effa800b4f1f16f7 SHA-256: 0718581e076326429d5678acd634e294e6631409f8a310bcbdc57774a9dce046
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, likely intended to redirect users to phishing sites or download further malware. The presence of multiple compromised CMS upload links suggests an attempt to leverage legitimate but compromised infrastructure for hosting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://drafthe.ru/uplcv?utm_term=ejemplos+de+notacion+cientifica+resta PDF link annotation
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e11b01147---tularif.pdfIn PDF document text
    • http://93564497.com/userfiles/35373631831.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/63125391050.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608740adb1041---ladolanono.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/eb6e51457adc104dfd14c82e71174886/30498783697.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7bd04e726---48452306920.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/a22da35fac3c8adfad603d05cbfc5c29/43299610953.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/46539229280.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/gufidojiwexajotixukewewaf.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/338df467b8fca5c5112d0c3ed653b6eb/safupidasumazupegekuloxi.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/welaneti.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/0cbe5bac101556c7026c246dd19bcf75/midojiwiwidetawepapo.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe3716db10---wamusizopawuwawe.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/d820d2634e2ec877ef78af0194252120/fanowejajozafeji.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/51coaefafb33ectsh73rtie520/lodiraxiniwab.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/5e48e0e4c78ed7e6abc7ed3096a22808/dufatomozupagenusu.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/nunarumonomaxojuk.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/fenuwebaki.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/282148445930.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/57352157361.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3394be617---41925160005.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/powepopo.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a826568494f---36604215115.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/sivufaw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AA 19228 bytes
SHA-256: 2332e45ffd0bfd83fe9429f6c86bf1d223dfc3caaabce2f7281609cff79f16d4
font_01_sfnt_off00013a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15237 10896 bytes
SHA-256: 1f7a6f33053007dd24779aadabcd012d732be83ed1424f772295ce022bb8d2be

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