Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f04e9b58439f41…

MALICIOUS

PDF

82.5 KB Created: 2021-09-06 04:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9bd59862939d632ea2f5082c5bc6483b SHA-1: 7d795acc31b9c9b06c99e9f7dcbf42e51ebec85e SHA-256: 70f04e9b58439f41c733377310e16dec2c88b83af9a047f678bd11112c87b1ab
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress sites. These links likely serve as a lure, potentially directing users to phishing pages or triggering further malicious downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 7

  • 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.
  • 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 https://medvor.ru/uplcv?utm_term=drone+mavic+pro+platinum+pdf PDF link annotation
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9d6f5d1dd---bovetarer.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/12416763214.pdfIn PDF document text
    • https://aashianarealty.com/file/80293845675.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3b29e363f---jaxuzutugavizuzorewolote.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///16086189933.pdfIn PDF document text
    • https://viceda.com/userfiles/file/guretovigenijefut.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742f02e0799---zujako.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/02172a4cbb6bba83190dfae9f138f951/risuguf.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/nosabijo.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/vexuwamalupo.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/92910525672.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/69625835604.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/23178955409.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/xutadob.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/zanolebogobika.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/mopex.pdfIn PDF document text
    • https://takipbizde.com/calisma2/files/uploads/88746289872.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b894f3d681a---6577538196.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/marunutigodenewefojo.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/josizutukodobozokip.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/50617990800.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d86aca9a8d9---jakujegiwomuninatoviz.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/e0d7efc603b792570dca4af0a61155a3/lokumiruxe.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD320 10780 bytes
SHA-256: d1c024dc56e99c0648febba2dd52bbe35c910a5db2aef3abd8d37f7294c466ef
font_02_sfnt_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_03_sfnt_off0000f3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DC 19400 bytes
SHA-256: 77d36633e14c2977323d0cc0563c2b29278b90a164a0692284e789e5c30578bf
font_04_sfnt_off000125ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CE 16180 bytes
SHA-256: c0217721a1102ad1f8a8ff5461faadb02f26a3634bfe128d67f68b25b112ee8f

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