Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ba0654adb3d13f…

MALICIOUS

PDF

92.6 KB Created: 2021-07-05 21:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5c2e69e9083c203125c7ccc15387415 SHA-1: 0c33bad4ea0f001fbf0fbcc1a9bcb0cb803a4f70 SHA-256: 05ba0654adb3d13f7d1430803d8f6a29a23c8f908f48b42d360657ac2b07cdbd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, forming a link farm. The primary URL, 'https://medvor.ru/uplcv?utm_term=power+book+2+ghost+episode+1+full', suggests a lure related to popular media, likely to trick users into visiting malicious sites for phishing or further malware downloads. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=power+book+2+ghost+episode+1+full
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a626efa4616---42494971185.pdf
    • https://echipamente-scule.ro/userfiles/file/savafetuwul.pdf
    • http://www.kickcommerce.com/userfiles/file/20143901638.pdf
    • https://floridainvestment.cz/files/file/jiwemi.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160cb01a9ce49c---juzosijefepugazago.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/9d1291acc6e07afb82b8f2ea393a3044/71223961192.pdf
    • http://ypdtools.com/ckfinder/images_store/files/76930630030.pdf
    • http://rauvuonsach.com/images/uploads/files/bokejegezoviwowisam.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3c1ab29cb---rusoloxavanukof.pdf
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/10048160155.pdf
    • http://4reality.cz/userfiles/files/88448034719.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc667c69a3e---vugovup.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/05fb7fd7c006fb50e726df5dd09d4f26/25671907360.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a82a7f8f3---5483976460.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/a6b6c5a07ad14ff7ae2418f218ca2603/1141708205.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/9de0ef6d92e9a7717e26aed31412690d/folizikelegomatur.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/81587328662.pdf
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/besigezipuma.pdf
    • https://hmanagement.net/userfiles/file/60236156839.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16081637f6a2d6---17721240035.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160876d6fd35fa---1101222084.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/7607df1142de5dac8df07ef82ee28781/mitununobizafo.pdf
    • http://siembra.me/uploads/files/70716428680.pdf
    • http://chamdure.com/DATA/files/bidutalowizifebikamovu.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/d8fdd4954e8a72f51adb73852da47948/8648515245.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_off000100e3.bin
edfc9fe1b29e61fb3d274ba4ca18f2747b287f651a8494609a70580fa5409a1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x100E3 11100 bytes
font_01_sfnt_off00011aa6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA6 16792 bytes
font_02_sfnt_off000132b8.bin
cf4d60f80dbc0a8e7b7b44c26000750543a4e37b44c9c97d2e485e32f0735811
pdf-font-stream PDF embedded font (sfnt) at offset 0x132B8 18960 bytes