Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d34d7fe0111b45…

MALICIOUS

PDF

82.8 KB Created: 2021-06-29 14:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ca667f3fa2fb927159d7756eee7f2bb SHA-1: bf8e3159567b5f7f5a7edf55655eb154ad60858d SHA-256: 65d34d7fe0111b4577bfb50037c5e8fdf2ef185ee48121fc15d7eb253d43172c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. No scripts were extracted, but the presence of multiple external links points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://energy-labels.com/userfiles/file/34690426590.pdf
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084da91a25b2---71711629730.pdf
    • http://hyundailed.com/upload/editor/file/58380545256.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/e3171bc6ebb9e689f85abe36eed894be/57167481471.pdf
    • http://aihyang.com/userfiles/file/89104945967.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a2be6c32a---gufedufuwomezum.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3d3b22169---90155653066.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/5ab1419f6272c05219ddb9bdcdd868ff/bivizasogapokufuteke.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1608484022631b---58954028264.pdf
    • http://yaqeen-eg.com/userfiles/file/sikububosaxog.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/0f25867308527ee16ecf5e893a1d8bfe/3929449186.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/gpolthblv45p9b36h9mkd6hv1q/97910544344.pdf
    • http://envigest.cz/upload/file/20793698165.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/0mf2nhsjee9nb5jrtgk29v6si5/13768353205.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898acca1d42---90852660786.pdf
    • http://kiavysocina.cz/UserFiles/File/nabafelinaw.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a3eedb65b---19142856491.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/b8feb557f2c22266b534f0e5ebc59420/bugenarof.pdf
    • https://argumentua.com/i/file/8589812540.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/bb388a0ed9856c2a0be25d4588dbd030/zububujuzonufezafigavo.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608493a32d79c---letinodilepi.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16080ad869a0a8---53345609583.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=wow+move+character+to+another+realm
    • 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_off0000e4d1.bin
370fb54287e91053efb0aa8f31c4f2560f311adcb85834d8a3b84cc19eda3e2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 16216 bytes
font_01_sfnt_off00010ea8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA8 16792 bytes
font_02_sfnt_off000126bf.bin
3b156139fabd3faa068205e4c29e16b67c578b2e9afebb82a1eedac6b425d9ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x126BF 10380 bytes