Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec7baeb59d89217…

MALICIOUS

PDF

81.4 KB Created: 2021-05-31 04:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2589b29fdb8da860c2cd2d710a7644f6 SHA-1: c712917e912e3c367777d3df6e4957c9b02aa35c SHA-256: 9ec7baeb59d892178a92c1b1537d9bc6b452634e65acbd7a51a51113a02826c6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it is used as a link farm to distribute malicious content or conduct phishing attacks. The presence of these links and the overall detection indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cructi.ru/uplcv?utm_term=coda+shop+mod+apk+2021
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad266bae0a0---32916830223.pdf
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zanomaterawolokadilin.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/98751c1bbcd960d2c007bc78cd8d28d6/zugeterovaw.pdf
    • https://ludifrance.fr/userfiles/file/jubizetisotebekubaxiw.pdf
    • http://alliusie.com/userfiles/file/sevila.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a34ac82c35c---55909491652.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819b40ba98a---22865315340.pdf
    • http://amandamaitland.com/images/file/kewuji.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/b8ba4d5e27e7e8d565b6de73eeddf788/27017463429.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160ac11a96d1c3---9514905775.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608100b32aa48---77563772574.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0941a2113---xagevumawufutadejifosuler.pdf
    • https://peterdegendt.be/file/vewugawaxetunoveboja.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16082f7316f5b8---pajowi.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7589d32a7---taxopodujeviwogifeso.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/43df3db0t8cqpcmnigme6a669q/52407253948.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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://scripts.sil.org/OFL
    • 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_off0000df8c.bin
f2533bad7705e222a54b9c1d433861b737b7b67da0494ae62752760950122138
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8C 4920 bytes
font_01_sfnt_off0000f03f.bin
2826dd126e4af1122ece80a0b312780f82ffef5998ffd23a492607cee285a04b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 10724 bytes
font_02_sfnt_off0001150f.bin
11e7ee760fd61b2991718f8ded6b35e6cb7c9ac64f3bbae0400e1eadb9cc3d5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1150F 16168 bytes
font_03_sfnt_off00012a31.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A31 4324 bytes