Malicious PDF — malware analysis report

Static analysis result for SHA-256 7394f0395ae57e97…

MALICIOUS

PDF

74.8 KB Created: 2021-09-01 01:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e890c9b28ab9af676283592d3bb3fdd5 SHA-1: b9f1783bfc299177329f6be21dbe525dd9d03290 SHA-256: 7394f0395ae57e97969290f7f5c5acce1c32ddde8633190951eb71e5ff73d9d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to multiple external URLs, some of which host further PDF files. This is a common technique for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://connect-event.fr/ckfinder/userfiles/files/27186693738.pdf In PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160907cddda816---4410456734.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/nudukutudifelexubox.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zirolatimuzosufuveno.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52333411043.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/92102402289.pdfIn PDF document text
    • http://raczcsalad.hu/files/65366308858.pdfIn PDF document text
    • http://lowry-averyreunion.com/clients/c/c0/c0e4e7922159a76f956c19110b7bfeb7/File/fadilujumuvulawigolus.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f3c51a3750c24e418a1e76834dcf9a61/nufowo.pdfIn PDF document text
    • http://dytac.hk/userfiles/rubiwenejujigejorebiwose.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/2019985465.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094bf7ed875c---67230880124.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/torefaf.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/gasozug.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/4dfe804eb0464b1c04ecde9bb413b093/51674531327.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/56953888414.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16127fe86b2c28---megadejur.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812ce4d7a6b---zuruvatapebumo.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778028c332d---xotufix.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/c1e34b60c98a6b54ccf44d77661c5f0e/jufege.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/42746096314.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=presbyterian+mission+lectionaryPDF 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_off0000c089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC089 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A0 10648 bytes
SHA-256: a9de9eefaf0c0e894860276f3f3baa0433c4f8e259cac95cd24d747a5a0619eb
font_02_sfnt_off0000f106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF106 17324 bytes
SHA-256: eefb92dc8e50416541226262c8fd989c1390f684cc910d68fa94a5f23a0b2fb6

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