Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbe2b17759b5596…

MALICIOUS

PDF

81.1 KB Created: 2021-09-06 11:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f64dd8ff17603b7090a4a602eca1fc2a SHA-1: 6a346b49f91e995e5dc4b129f99c13e878db032a SHA-256: 1dbe2b17759b55963a9fa5ae788556a92863167409791fe5747d1cc1dc2fefd5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The presence of these links suggests an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://macroedunet.com/userfiles/file/gowepatofijujimege.pdf In PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47ff573d5d---17599105442.pdfIn PDF document text
    • https://landbar.com/upload/files/70202646007.pdfIn PDF document text
    • http://yigang-lin.com/uploads/files/202108191855146757.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/fizadewofodova.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/zigajubu.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/tubevexigikijif.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/ea6dd34e4b0a1cddea5d76825e7dc7f4/78198720447.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/pofulesebubebuperivigo.pdfIn PDF document text
    • https://viceda.com/userfiles/file/25488222766.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/purewifokoganixe.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/fetuziminejisatotolir.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///muxoferepejedo.pdfIn PDF document text
    • http://gaia-onlus.org/userfiles/file/nijorugiwekowigofan.pdfIn PDF document text
    • http://luatsutiengtrung.com/app/webroot/uploads/files/62838395378.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/fazezukojixobajogugokilo.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/33368801625.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/83462658134.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/0hmbkcf4fd4p5btfijsr9t8k2v/40795586326.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210803_3F4E28245AECC443.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/9650c9ded31f526ad7012b78e499f4ed/movijiw.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070f66478c07---tasitazarojojapef.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a43659c408b---suwuralaxowesazazukomer.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/79297972954.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=nissan+qashqai+2016+manualPDF 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_off0000d8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A8 17688 bytes
SHA-256: b0d9db4dcd12bb52ba5043b2a88c44b5efdc2c07eb13dd6901d9ff6c0c4b0466
font_01_sfnt_off00010658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10658 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6F 10608 bytes
SHA-256: 57a8b8044013d7b9da5db2d6b3a0cb52e0995eade3a7e568d73561f5283bd500

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