Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f66c7c249c6d9b…

MALICIOUS

PDF

79.6 KB Created: 2021-09-05 09:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ab3ca4110b229ef300bfeb4ccea9c61a SHA-1: 998a5dc998c819841acee96497ff0ba2d39f1c20 SHA-256: f8f66c7c249c6d9b58ddadc0135eaa2a84e2867c4ab442fc53896293e29f516a
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it's part of a phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further malware. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://coretry.ru/uplcv?utm_term=switch+hitter+sara+ney+pdf PDF link annotation
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075a7a1a421c---24235936480.pdfIn PDF document text
    • https://netpage.info/userfiles/file/74601083925.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/d49aea18a52d02c575f9a9e31e2d3f6a/35244322613.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/b3ecbb847d8dc8e5b6ac713439f2a30a/jojasifono.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/47817699683.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210807021038.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/mofupajovomabowozuwefe.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202106261106188038.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/mojanolavawefudegosadom.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/wadij.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/kipuwogisasimim.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9244d4d923---46871934040.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ca8262179---7009832556.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/40743886625.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/20834492140.pdfIn PDF document text
    • http://eventechsite.com/files/files/21582347213.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/dade354b3bb8eb7cf1445a99fba1d17b/xibizotofe.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/47527287849.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/terogojaxovigekupag.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/gizunevibowew.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/31209007961.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/12259523090.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/viwusuredaganetag.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_off0000cf21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF21 10824 bytes
SHA-256: 71f45e22f3fe49dc961392c8e8e53b70a1ae0698eb43ffe5ed17c640158e2201
font_01_sfnt_off0000e81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81D 18640 bytes
SHA-256: 58b7f5f51e846a601216b150c63d9b765a345b702201ee8c481484587b163b3d
font_02_sfnt_off0001190e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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