Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb2476196f163b9…

MALICIOUS

PDF

102.0 KB Created: 2021-07-26 14:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d30f5bc7bc7a6d92de24c3c04dddfb25 SHA-1: e70b65f7eb50efa7e2670d2bb37ad3f20a6e8c85 SHA-256: 0fb2476196f163b919cfb2766ff0498e010e16dde69efffe1139352342625414
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and contains numerous links to compromised WordPress sites. These links are likely used to host further malicious content, such as phishing pages or malware payloads. The presence of a 'download button' heuristic suggests a lure to trick users into downloading malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844ed04ca84---79275448574.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854da0dae11---71143503662.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbf94e8f08---zumugevu.pdf
    • http://blankheich.de/images/uploads/file/zexagaroxoperuvupasifer.pdf
    • http://midel.me/userfiles/file/siviwesawete.pdf
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40539142360.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822af92feee---36062671361.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/kkcn3l0jc7d8a0jbvgm0cn4u29/vofemumutu.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4747a3cd44---zuzivaja.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/0sdnjcuuvoona9ab21nk18cgj8/61644445980.pdf
    • http://www.urbanwaterways.info/files/30721222947.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082fad06585c---74646058361.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16080d523c94fb---62651914102.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/3e9601a9c7eb09b70777bec462b990f4/jemolukofezemupadi.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/df44f293086a0d509d6a4484eedb0df3/lojadi.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/sofagudironotejoritixezaf.pdf
    • https://mumegram.com/userfiles/file/49455675849.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160851e53695d0---bafunojubopanidelenajemel.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ecb64cc0e---junix.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a40c22badac---68962264704.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/566dcdefece4cd5fb2054b55f310f0db/2298596262.pdf
    • http://euro-ex.com/images/blog//file/neladefi.pdf
    • http://bagiez.de/userfiles/file/lupodetanorup.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=teaching+feeling+apk+2.5.2+english+version
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011330.bin
2f088311e3cc47affea05821c2def65328b1f74a195200b1b3e81469be6e99d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11330 16168 bytes
font_01_sfnt_off000128cd.bin
b12398266d2c3809c3baf4915c2b0532d17b95110dc08906340ceaa0a8caf614
pdf-font-stream PDF embedded font (sfnt) at offset 0x128CD 17428 bytes
font_02_sfnt_off00015675.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15675 16792 bytes
font_03_sfnt_off00016e8c.bin
ecd599573d8674194f40ee159834dd7820a55ca536e75652fdb34772138ec82f
pdf-font-stream PDF embedded font (sfnt) at offset 0x16E8C 11100 bytes