Malicious PDF — malware analysis report

Static analysis result for SHA-256 3574e9a99e10ce06…

MALICIOUS

PDF

112.2 KB Created: 2021-07-02 20:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f16d28bf2fdfd4e8f49e95617b7f3634 SHA-1: 9ff39906a75060233e5740acc5d7bbb984c1a3bd SHA-256: 3574e9a99e10ce06dc98cd4eb1ae1456f605a09f1c3d89752fdbdc64d0bf310a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress sites. These links likely serve to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://wastran.ru/uplcv?utm_term=erosional+and+depositional+landforms+of+glaciers PDF link annotation
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/451593d1ad9d847a420bfc48c4dea527/39938263763.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097693f809ea---11381356019.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38e97ac28c---91909662599.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/50946661721.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/jakurovuwuromasan.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/gukenarizefakimunu.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a62b0477b7e---tademakiwe.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/3e903e88e3f70448b2dfc96afdb343af/vebitapew.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87fde21385---dujedokez.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/fifajopoderejavufamu.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/75043579510.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/ninedupof.pdfIn PDF document text
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/nedivanavigojetaligakixip.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/bae0f2f5e5f3df155a833a987549c7bd/70575374237.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ompa6lm4i01kc198lc029hai8q/zeroroz.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b971c7e0fb1---peperejamufowomavuwaxer.pdfIn PDF document text
    • http://edgewood1962.com/clients/2/2b/2b25cacec04995aba37d275b9c35b4d1/File/38202851568.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/7312d27b98cc1ffc1651317c87adf050/tudopilonos.pdfIn PDF document text
    • http://tencanpowder.com/d/files/tuwejoxolefejabonari.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608b40c6d8e63---pobavafiganoxevu.pdfIn PDF document text
    • http://masonfamilyreunion.org/clients/b/bd/bdaf0a3c19eb5f10f0519c747c117e37/File/25060273216.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825577f3b75---dubukobikarom.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_off00015300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15300 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B12 18148 bytes
SHA-256: bda5f0b573f9770db3d0339f70a7bb9631df1718cfdd0ccc8e69aff8f41b2f9c
font_02_sfnt_off00019a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A32 10948 bytes
SHA-256: 3e411473ab6b9428dd988977e9f79d267a302d58c3145419146dc2a72ed85611

Open this report in the interactive analyzer, or submit your own file for analysis.