Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7ee8e9c4ce939c…

MALICIOUS

PDF

94.8 KB Created: 2021-07-30 17:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 167d688d5faea370eee6ae323ad68014 SHA-1: ffe81aae5f5a02d5f5ae523eb956e1c6f5ed1786 SHA-256: ed7ee8e9c4ce939cbc5d1d224dfe493fe5fdf8d3883fa1cb5b675de5632b09d3
196 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and trojan distribution. It contains a link farm pointing to compromised WordPress uploads and disposable domains, with the explicit goal of tricking users into downloading Vidmate app. The presence of a PowerShell execution sequence suggests an attempt to download and execute a second-stage payload, likely related to the overall malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://toolsatool.com/userfiles/files/46161317736.pdf In PDF document text
    • http://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/62398295972.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/jariwajamejuw.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607487aaf4001---4670355926.pdfIn PDF document text
    • http://wardwrightself.com/clients/863644/File/gibiwuv.pdfIn PDF document text
    • http://wajl.net/img/file/202171401027.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/ninofanopafeloxuxol.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f36aa7c35a---65866179470.pdfIn PDF document text
    • http://imbirimbir.ru/files/47517368054.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b46985d60cc---fawetizepukapakawir.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021062813112460.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/lufanegugigikefaj.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/96734519903.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/46404199930.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/745bfad800b11d7baf43804f9b10359c/jutuxibemufazup.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/puxaba.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/j585p2cts76tv0tqd9qje3uu2f/19645460492.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7fc6bc283---83874826715.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/46998387618.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/3cd3616e9b29a6e131e5369b9c1b7ee7/vuvozixeroderepapuke.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608447cfc0742---kuzuliwefo.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210710_8726DDC929EE0529.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/c0b3a6160003a2a622ba7ae62eecc155/xedixefapigokalof.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/xizexokona.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=download+and+install+vidmate+app+for+pc-+windows+7%2F8%2F8.1%2F10PDF 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_off00010677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10677 11500 bytes
SHA-256: 0fad0789f1bf1e8ab2a88e85c7892d983e9f6691cc4c92c9953332c55461d348
font_01_sfnt_off000121dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DD 18176 bytes
SHA-256: 48336780e31c13c6105984d9c5c478d69b00d28d05e7ac3033502a015c06173d
font_02_sfnt_off000151b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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