Malicious PDF — malware analysis report

Static analysis result for SHA-256 306cbf548be825ca…

MALICIOUS

PDF

84.1 KB Created: 2021-09-08 04:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 26ce8db8e61817382d3cbc96bbaf4638 SHA-1: 2b962981a35396d4799cf180c3908bf0a9c11c38 SHA-256: 306cbf548be825cae1e369efb93399535e58056f46a2e41dce11b02a61005be7
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple external URIs pointing to compromised websites, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is structured as a link farm on disposable hosting, likely to lure victims. The embedded JavaScript, though not fully detailed, is a common method for initiating malicious actions like downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2288206739.pdf In PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1608b143d472eb---lunagojo.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/58356674351.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/62816156726.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/tikipuxesinavufose.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/kigezi.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/tonagefem.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/84f4ac4cb81adc105d2d0c836172f396/dejejalirilosira.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/nn7jdiqas6kdckubj53bvfdn85/voxuba.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/vabatubuxodobo.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/foduduwuwotew.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96d09f142d---webadesaf.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/7ehtch3fm2gjud9b1ee51vsdp2/12995910768.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/84c9ca154457c2bb08b32091dec1a331/351784022.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/406448659e1e6c96d468915fb451b42b/83534512379.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/begasowupuxemofiteta.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/xomavudekuwiranovamoxoloz.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/5262fe0ae28bb79cac47f9649a5700f7/domis.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/movezexed.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/12746389670.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef69314dd8---8819437222.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab729ad215b---didukeriraxatabovator.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d80cae701---futirudogudojin.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/73ed3cf04ca40f5c255b0b8a88ece781/relifizezejisojule.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cfcd59765---kukutopenunorid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=gait+analysis+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE602 10292 bytes
SHA-256: 8a81601d0fe928ef37d174534537254edaa938e2537658867b7fceffe70caf12
font_01_sfnt_off0000fd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 17560 bytes
SHA-256: 0a46ec0d5f2247d7150a6b7cb317a9f3d632be5dfbe796c4e50bbcbf257ea2ca
font_02_sfnt_off00012add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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