Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee29f60eeee59b4d…

MALICIOUS

PDF

85.3 KB Created: 2021-07-06 14:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dab6ad8110500b48f1ba5767cdcf38bb SHA-1: 2f2cd724a2d37da83268de8ea3ac072502418614 SHA-256: ee29f60eeee59b4d8ea9de4d3bf03ffbed07ae1ac15c401c6f6d046fa9327203
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple distinct hosts, some of which appear to be compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://robalton.es/Albums/images/file///fidirunakazibedotuzomowu.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607412ffeab81---wolosofunikoluxesadizul.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b072bbabd9a---zoxuwadenure.pdf
    • http://tdfinalists.ca/clients/43449/File/takafele.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8d5e93889---12342093395.pdf
    • http://arablift.net/userfiles/file/9681212144.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/807c6f2aa512fe6b4bd19b21b1b3d931/zekijisoxatotipimirawim.pdf
    • http://chhsmahs.com/clients/8/83/83f479e57a8bbaec88b4a04d821ef24e/File/50545094566.pdf
    • https://gizaviation.com/uploads/files/77385857034.pdf
    • https://capital-tic.com/upload/ckfinder_temp/files/20210605005023.pdf
    • http://ahrestygz.com/userfiles/files/20210607_051232.pdf
    • http://ttworld.hu/uploads/content_files/files/pakomazop.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7972305ced---fodovemuj.pdf
    • http://standrewsparishhighschoolclassof1964.com/clients/70428/File/sizipobapofakogete.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/ceeqqf5fvog2ld81l18d8b7uf6/66237300426.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf3544c36---gamosipixopumaleki.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/9ef2b063de99b0ba1f268959745a6c4f/44530758217.pdf
    • http://mevlanaasm.com/resimler/files/64326362380.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fde7768ee2---50628180317.pdf
    • https://corghialberti.it/file/ritisetoxoboxuvijojimubo.pdf
    • https://luxesystem.site/js/ckfinder/userfiles/files/rudekulujodofili.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087d9a682dce---firet.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d00c136778---robedagabevepe.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/b8926c885ea14d01ad078788dc165129/60126707354.pdf
    • https://lienlacanien.com/img_pages/file/77509427122.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=the+difference+between+subject+and+object
    • 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_off0000ea39.bin
844a60cb5fed1fa6d8f91dc3d73b088e4ee0d916abb6fe92ca989a9181d45f1c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA39 17188 bytes
font_01_sfnt_off0001166c.bin
c83c8ce31445f3d71be23b184d1132dc7eabdb78efcf5cf46160d224db98b246
pdf-font-stream PDF embedded font (sfnt) at offset 0x1166C 10944 bytes
font_02_sfnt_off00012fc4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC4 16792 bytes