Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed04496ac2aa7e46…

MALICIOUS

PDF

102.1 KB Created: 2021-06-29 04:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9ff39b1ccb0d9745e54591f726854f26 SHA-1: 1d6f234a26deedb75591d6b13536621e1ff53d70 SHA-256: ed04496ac2aa7e461a0596af26a3f4a235de0ca96b1a8f753cbde7904b242208
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to compromised WordPress uploads and disposable hosting domains, suggesting a phishing or malware distribution lure. No scripts were extracted, but the numerous embedded URLs indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=bilateral+meaning+medical PDF link annotation
    • http://asea-admin.com/_userfiles/file/20210624204743.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c2e1b6834---bugeziwefikax.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/26916183016.pdfIn PDF document text
    • http://www.dismaplant.com/ckfinder/userfiles/files/sexipojab.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/k21hvhdpah05ms4c0s5qrc7cec/87296111522.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/p0jn3rg70m539g0ngun5pn4rad/boruwoxelodivebemolabomel.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/jujinimuzoradedaxaxosopu.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/fisuzepefiwax.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/dukovufuwe.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607db5ec789ae---45709773319.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb99c446a8f---64301887089.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abbd9f0b57a---50066223695.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b51d49021b2---midewiwifedexomenibapusin.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/93904130705.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/faba9ca36a2842df2b69f8a38690b8c9/85292393461.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/94190227853.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/19766794163.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/478c2a8600cd6aa0f5fa707eded47c9f/94761206121.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/1e7o8qmaoko5a2pot2hg7o1nt0/1461022175.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/30733117086.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/a0f094dd10ed03b0e62a7017783dc6b6/83521141470.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/vegilufetitologu.pdfIn PDF document text
    • http://imaginove.eu/data/Files/wiwodesegoda.pdfIn PDF document text
    • 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_off000128f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F2 19576 bytes
SHA-256: c8ba0295a79133e7d479ca1b1a8b32c18b7d4bca729a103c2c5c1c7d4078ebe8
font_01_sfnt_off00015be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE4 10480 bytes
SHA-256: c8ec54289d283190236ddb907b1065a0126177305c7063a905b7a5d14f9bb222
font_02_sfnt_off0001736e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1736E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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