Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27149452ea4b148…

MALICIOUS

PDF

83.3 KB Created: 2021-10-12 08:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 61fc380bae091fc6eba830da167c1c55 SHA-1: 2cc972786f0fa2c3798d69f18c0e6e5dfc2ff648 SHA-256: d27149452ea4b14804448e98c2464fe9d5221f1bcf6c6f95e7b95906fd4d1f5f
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on disposable domains or appear to be compromised WordPress installations. These links likely serve as lures for phishing attacks or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://intproplaw.com/admin/uploads/file/71533007975.pdf In PDF document text
    • http://kingsshopping.abwingsmd.com/uploads/files/14787995243.pdfIn PDF document text
    • https://geniodelweb.com/file/94650101132.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/63186763836.pdfIn PDF document text
    • http://www.2m-france.com/img/uploaded/file/seresebizapononufebe.pdfIn PDF document text
    • https://kueapem.com/contents/files/niwikul.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/lepokujejo.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/2c1a78a4f27f0fac91a593a015d85162/81029583619.pdfIn PDF document text
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/33010221455.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/mobakiz.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/patemune.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/reditimavelariponuta.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/fca7aqtduegjid6rchro47igb6/zifewoz.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/laxeninoluxezebowe.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/1grbfafidupdo4p7sbs9n00rhi/26083830808.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/161494895d5036---89917722552.pdfIn PDF document text
    • http://violetstudio.in/userfiles/file/koborexuwuz.pdfIn PDF document text
    • https://camerabentrenet.camerabentre.vn/ckfinder/userfiles/files/69494871870.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/rutemuvaxituxoxo.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/dipupemuboxedimej.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/dedorewegexufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/D9plVHj2VOU/uplcv?utm_term=on+behave+of+meaningPDF 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_off0000de0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0E 10480 bytes
SHA-256: dd23eb601573cb6c19b3ddb0107ae536c8f7f3bea87525eb2bc38edeb564e1b1
font_01_sfnt_off0000f5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B2 19344 bytes
SHA-256: 20fdda0a7b9c86ca46d0e1709d3cfaa4323e652f1e15a0320e57e560cbbfadac
font_02_sfnt_off00012803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12803 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1