Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d97b7b188231a1…

MALICIOUS

PDF

106.3 KB Created: 2021-05-09 08:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74f4dbb2d167d50f53d5a6c7ee3ac214 SHA-1: e4efbba77398e744cd1d1d6995d74525763280ec SHA-256: d7d97b7b188231a16cb2ed0b77dac84e7e83354a21fc2d7166a85bf36b8f148c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The document body text, though partially corrupted, includes terms related to 'Edgenuity answers algebra 1 unit test', indicating a potential lure for students seeking academic assistance.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8364

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://wastran.ru/uplcv?utm_term=edgenuity+answers+algebra+1+unit+test
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7e5f07372---50949569148.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/2vb9ef0401vskp2jq66lhkvka1/46493498392.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc2a9726ed---68367768822.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/f776751033c5618f8c3174f464e37ff4/79523861704.pdf
    • http://angelcabrera.com/FCKfiles/file/14038556238.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/b5efa9eea38d479901b85d6f98d73034/74569901182.pdf
    • https://ajitcoatings.com/uploads/kafaxo.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/2844dec88bbaa57d97424e0357e8fa41/23130810350.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607f33f4da0ce---tisifikumogel.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094c19ef2d86---kawadusejetu.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aca0a20414---gesigotakowuwa.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/780fd3acb45f93a4498f14f95a34bf38/kojezejefima.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079371863e6d---zexolavatebibefaserurela.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072c29e589ed---6874013721.pdf
    • http://aps-mes.com/files/file/kijut.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/754b2d7071d1ce6ceaa4eef8393616bf/mojekimegewijakij.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/8348116b6d9e078b60608a8e0f8a07f1/86883691996.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL
    • 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_off0001549f.bin
28f5e0488fcac66784c7d80e65082e8c2b4a4dfcdf4f383e3f5638ea5e3d0464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1549F 5336 bytes
font_01_sfnt_off000166f0.bin
d7062a76fb382d54964a8aa766cd0e0c6a1a9384e96e9ae0a34f7b7d73554096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x166F0 12408 bytes
font_02_sfnt_off00019154.bin
17cccdf9764b4744bdac63d3280c670360eebd15aa95148f3ee6fc1410133889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19154 16316 bytes

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