Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1083faf398d48ad…

MALICIOUS

PDF

96.6 KB Created: 2021-07-22 18:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: abb47c9f18291bb5427aac8f94d3f40e SHA-1: 6dd8f2f68705475bef05292bc6115e53bdc81b8b SHA-256: f1083faf398d48ada501b44d763a5736b1f2164734b68c6795f25c29e8cfcffa
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised websites, specifically leveraging WordPress super-forms uploads, suggesting a phishing or malware distribution lure. The PDF structure and link farm indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/67a5ae1afa8d8b69dd1c189dae58f37b/jogukiperewugenujugu.pdf In PDF document text
    • http://upbfassadenbau.com/upload/file/75859608370.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/30lsgl9j0c1j7necge04mm88i6/28726867013.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/wudivu.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/83951251768.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/8t1f2ehb8s2lfllcdl9avt6534/57605056044.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/038116ca8ccbac043a5b5b535249c4f6/pawunojisu.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/19729326129.pdfIn PDF document text
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/73230611395.pdfIn PDF document text
    • https://ccichn.vn/data/upload/file/nikurutenaliropejisixok.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/waxawovifip.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/d1nir91hmc78h6khcbg4e80d1g/64270763527.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210715205033.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608000b75b870---80757925373.pdfIn PDF document text
    • https://codecs.roimages/file/76244743161.pdfIn PDF document text
    • http://klpa.net/userData/board/file/57506582378.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/21126187327.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/97eb7e0ae509e8d6a7ad3982edd43e5d/76611203726.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/57769641651.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738974138bf---vovekaniredanudugewufil.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607806a711968---jasatusuxarevelesoturoxib.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/47065294225.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/ninexik.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096537e73d5b---fonokegagoguvunawaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=newton%27s+first+law+simple+examplePDF 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_off00011349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11349 10720 bytes
SHA-256: adbcc8a6c06897934552d15e66f53ee103c59b4a93e4b565f3cc6ee05e78cf74
font_01_sfnt_off00012c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C04 18088 bytes
SHA-256: ef15733cb174499cbb0fcba58a5482842be4a77425b1fa5843c34668c3f4c582
font_02_sfnt_off00015b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1