Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e190647e69564fc…

MALICIOUS

PDF

96.7 KB Created: 2021-07-28 01:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 0c3a624659e3f92f5bc7193408319a4a SHA-1: daac50ef0569b2b52b3c51bdaa191c88bfb77907 SHA-256: 3e190647e69564fcfeffd83da08b0d5a1a38c17d7f2df0f56341c46080bbf670
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate maliciousness. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The presence of external URI heuristics and link farm indicators points to an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/monizin.pdf In PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe688254b0---wejibazuvinogit.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/1d9q0qnb3degnoq1i11pqu69vu/fusegemasag.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/99567799209.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210620091238_4jgdl3.pdfIn PDF document text
    • https://ideaoneinteriors.com/images/bulk_images/files/23679961536.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/padegutajuk.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/0a8b8c885eef2d01b419664361832731/tamudeli.pdfIn PDF document text
    • http://hoskinspugs.net/clients/40498/File/wivoweziwovu.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a473470310c---46074546656.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ecaca7e8473---zokijinapumejezito.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/45786651713.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/13dc3512cd317e8cb0d98be9f702e4e6/dulefitanijarisavefinalov.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/20811847353.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/fobusaponufipoledofu.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/gelobenenizinomilebufiz.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9ea4a392d---jexugini.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/65945627655.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5225bdb64---vilikirorutixuzozosedu.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/46d2fb71aa47fa02cd8707ad4a343a2d/zibipatedofebag.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608215b6d0f76---53957641305.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/28105048474.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/45838440888.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/kifeg.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/29f07045059ba76ff83a63d750fcfbc0/tuxuxekifoladalanikew.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/0f8fb3b794abbe4d3f46fbc725a43dac/bodenofasopizov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=wondershare+uniconverter+apk+modPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC7 27796 bytes
SHA-256: 9a189a43ba8e0135d62480e31a76f0ff42675f4a87582674c7ea38a021976698
font_02_sfnt_off00014588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14588 16068 bytes
SHA-256: 6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d
font_03_sfnt_off00015aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA9 10984 bytes
SHA-256: 119f0cebdcf4a06819447969d76881377c8f7335be22c083c7c2cb729b3a7e79