Malicious PDF — malware analysis report

Static analysis result for SHA-256 178eb710a526b317…

MALICIOUS

PDF

79.0 KB Created: 2021-09-16 17:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8be0f9d8bbab8a79a26a40eb8c319af3 SHA-1: deac0ae51640bb57d81f3a122126c99a6737e4f0 SHA-256: 178eb710a526b3174e6551e1552ba924d4b41c50faa565cdccd95b49098a30ef
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=clash+of+clans+hack+latest+version+download
    • https://gullyracing.it/admin/ckfinder/userfiles/files/3803117853.pdf
    • http://www.sun-green.eu/ckfinder/userfiles/files/xenumoxufofajexediletiji.pdf
    • https://letajicikoberce.cz/userfiles/file/wurakivoxiforerove.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161377098d1ef9---10858280196.pdf
    • https://parvazyab.com/basefile/api203/files/61118224997.pdf
    • http://12shio4.com/contents/files/kifar.pdf
    • http://greenvisioninternational.gm/userfiles/file/sazazaxavutejewovu.pdf
    • http://riverside-plaza.com/upload/userfile/files/38238761017.pdf
    • http://getsolarny.com/userfiles/file/42048553628.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/036d6cef82c5a718df80c57be73068a1/babodasov.pdf
    • http://danieldesignpro.com/userfiles/90405352937.pdf
    • https://giorgiosantinelli.it/file/59689936171.pdf
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ruxene.pdf
    • http://upnbkk.com/file_media/file_image/file/25418971776.pdf
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/zogutib.pdf
    • http://assessmentinsight.com/ckfinder/userfiles/files/65462329210.pdf
    • http://scuolascifondocortinadolomiti.it/userfiles/files/xawuku.pdf
    • http://konberdbio.com/upload/files/rebiwo.pdf
    • https://tonmathunglan.vn/upload/files/32325269881.pdf
    • https://xn--80ag1a2a.xn--p1ai/files/file/rikimosevezokeziresoxe.pdf
    • https://abctranslink.com/ckfinder/userfiles/files/21253199871.pdf
    • https://petribax.nl/userfiles/file/28501501366.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/93b9g74l0ud7n9d2a33f5r1gfi/63071889000.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613349848252b---dixejerumisomaxotiguwuki.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/aa2720e8925bbae0e1b971e049dd4a36/24658233813.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_off0000cfe2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE2 16792 bytes
font_01_sfnt_off0000e7f4.bin
0d5fdb9069a94254d95df8f42c502aae150ed8b81e9d7223c994e02db592d539
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F4 17296 bytes
font_02_sfnt_off000114d8.bin
9309ba55476803e206de560f1b2858f7e0b291f606cb6147d6ecac55505efdca
pdf-font-stream PDF embedded font (sfnt) at offset 0x114D8 10848 bytes