Malicious PDF — malware analysis report

Static analysis result for SHA-256 466532d659a806ae…

MALICIOUS

PDF

86.8 KB Created: 2021-08-08 04:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e38f22f66aebb440fc2ff1875fe14641 SHA-1: 3f095e749c8060c514df008a7982ab3976c4873e SHA-256: 466532d659a806aeaf3a99f2b5307b9ec045c7775581123a27ff6559d5c87a57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to websites that appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The file's structure suggests it's designed to be a link farm, potentially for SEO poisoning or to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hublihorse.com/uploads/userfiles/files/69184699213.pdf In PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ed751b062---fusuwowupewevemibaxij.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/78568099283.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/7986602939.pdfIn PDF document text
    • http://brownewingfamily.com/clients/a/a4/a4d7a48ed280e719b438ae57db99af5e/File/bupuzuzotuj.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/61644532067.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/pukoxojeloruvilikikud.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/51947645981.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/kadisuvi.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/97886356547.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/a56tr6nlvlkaemk864hpc7v0fr/72093009576.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/15586321096.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160e1ec73f0b50---68402121439.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/79381255129.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f6f0606ef51---bexaxejunetifit.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/3476785898.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/39650629289.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e3aa5c9b5---85978229601.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/f506fadaa8eb2a600d09b6d56368059d/48392969851.pdfIn PDF document text
    • http://foto-video.ch/userfiles/files/13417697262.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/14422616815.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8ce72e0ae9---tilivog.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcac1a1d921---24609320913.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160711389510d3---lofagokatejepilemowiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=deathrun+portable+mod+menu+2.6+2PDF 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_off0000e16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 22624 bytes
SHA-256: 9212fa4f0429e0142572cbd0c921b0891c7898e41c466bcbc78bf1fa15cdaaf6
font_01_sfnt_off00011972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11972 10992 bytes
SHA-256: e3b4e756d8e75f5cef1ae585923852eb92bcabfd3367dd9d24944d5a115ee09a
font_02_sfnt_off0001329a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1