Malicious PDF — malware analysis report

Static analysis result for SHA-256 0360e89c1d79b18a…

MALICIOUS

PDF

94.4 KB Created: 2021-07-25 17:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b68439eb1158a6df6ebcc2e90c7a007d SHA-1: 0f720baca6692f3b6f78b23cc1d4b52dcdf46b7a SHA-256: 0360e89c1d79b18a3f1269fad0f4d858f852c414c8f57db0db87400c8bf368a2
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF contains heuristics indicating it's a link farm and a lure for remote support tools, often used to trick users into downloading password-protected archives. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the overall pattern points to a downloader or dropper mechanism disguised as a legitimate service, likely using obfuscated methods to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://wowbond.com/upload/Fckeditor/file/59213494731.pdf In PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/cds0pks04bhcrkgdjfodnm0b6o/75575031539.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/danozika.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/a6a2a2c3a46ca05d4583b2722e51b2e1/tavovabozekavoxokigene.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160780b97492fa---tebujipudinatigimupuwew.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/nenajedopopax.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/guxolozoli.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/lhne9loolpg71cuo6mlfiqmlir/11585899754.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/6043565792.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7c380d0aa---butaja.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/7392023013.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/61358908172.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cde7153ab---devetijolalejaj.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/rhma257s1euunue4k2oil99l2f/23499960816.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/73254262322.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/2744165344.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607eca5000ff1---29652218600.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/sitemelugosaw.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/gujusigiketalog.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/cce5be0625034185664711b6c24a6fe7/jakevoz.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/12051639255.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=driverpack+solution+13+iso+file+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF090 18140 bytes
SHA-256: bcc5054071c1bd98297d9c679595d4c2e426456b99aeec226c7f73898fcdd606
font_01_sfnt_off00010c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7B 11184 bytes
SHA-256: 050542f1389e404e92913b9e41cb090451cd94c212ef034d6761c4c83f067b4a
font_02_sfnt_off000126f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F04 17480 bytes
SHA-256: f7bf146c34a380d41b3e04895c0ea3c3eb174590856a95f69014a0a16e3aedab

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