Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07f031691a35eee…

MALICIOUS

PDF

84.6 KB Created: 2021-09-16 13:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: add337da5c7f228f25034bdc7d92c046 SHA-1: 9aec2683eb5f50ef7d66ebf5d39cf9fddafb46c3 SHA-256: f07f031691a35eee86050b78e42abb1c08d7ffefd25fc40223df0861b214730d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that function as a link farm, directing users to potentially malicious websites. Heuristics indicate these links are often hosted on disposable or compromised domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://wastran.ru/uplcv?utm_term=minecraft+a+true+love+apk PDF link annotation
    • http://kleinschaden-expert.com/userfiles/file/debij.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/3648382047.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/nufefuta.pdfIn PDF document text
    • http://aucontecnologia.com/userfiles/files/sozositiperer.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/severonapofedenemoz.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/42803201833.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/jemaruwuvetikorebixef.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/7mt216ds9n2ci2tdnoki3m34r0/88399093232.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/genijikifusagis.pdfIn PDF document text
    • http://masonhn.com/d/files/govanoruwofoxide.pdfIn PDF document text
    • http://linklandhotels.com/upfile/editor/files/zikuvezitexetumoderut.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/33da335966809270df743cd0a3e77264/4512979843.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/30462375185.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/jatazuvesidefamegob.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/54011753432.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/18410267971.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16142c65f29f9a---radifamixoviteg.pdfIn PDF document text
    • https://manenshop.com/upload/files/dinuluturagazedirazumaje.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/63106761225.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/24103b0a95199f4ee1e772e0bb44489e/kafewosarepumerafetif.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/pugavelela.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/64478090086.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/mozolakabesone.pdfIn PDF document text
    • 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_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 20672 bytes
SHA-256: f013d07b86d99d47ceb801759d6e933ea73a03ab78351ec4a71e232b26e8d3c1
font_01_sfnt_off00011501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11501 10556 bytes
SHA-256: 75c33ebaaf4e5fc0eee8854abecb0375356f291532dae8a4c045476f813a2852
font_02_sfnt_off00012d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1