Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabe1fd1f339e903…

MALICIOUS

PDF

95.9 KB Created: 2021-05-21 02:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67a807e093cf7b0f546c771212f5dc77 SHA-1: 54a76f7c40c496819f83a1f8f68c775a102fbea0 SHA-256: aabe1fd1f339e903d6249f936ed57fcfdc79324cfc7bf26bd09156495ad52a7c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The embedded URLs point to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically to appear as a free book download, a common lure for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7921

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/b44218314e35efd14cab7b608451c4fb/muxevejifid.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16073005e55273---67962512713.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/0dm0p3c81qoljapre7serp8qg6/3710821368.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e965190a50---118517212.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3336da8bf---22153786061.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/sogijobilifata.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/b56c034c2105c7033cffe17953f52b2d/kebajoxirejixafejoloxewoj.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6418187a3---belexafavevemepujiwu.pdf
    • http://alhouti.com/userfiles/file/bejogipixazusepulorana.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b1c7be12---zexepuxe.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf38c6515a---15090643905.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076276802e5a---kodibegu.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/b21489dcdb0912abb90d1549672c4d28/dawigosaritopezevimiluv.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d9dd5dc71---42420112261.pdf
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/8dea940aad683e72e7f12f727a0be14d/56563450287.pdf
    • http://angelescare.com/userfiles/file/71382788824.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=chanakya+niti+book+in+english+pdf+free
    • 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_off000122e1.bin
929ccdf1320e4b4a0fe9ed6db63bd629001482d719eb61aba7e0bb07ac5f3fa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122E1 3616 bytes
font_01_sfnt_off00012fc1.bin
28027ead4b1315a8e3a42776ab2164e5a7efaca9bee71517287f9c05994a6d1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC1 5512 bytes
font_02_sfnt_off0001427a.bin
011768123d19ae92dc5cfc63a87c9eeca492d3647154783d0ee8ba16d334a133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1427A 11960 bytes
font_03_sfnt_off00016a41.bin
509c32d54053b7984b3f0b41ce9cbb3db232641e11027434d36e1c0bdbbe47c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16A41 16264 bytes

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