Malicious PDF — malware analysis report

Static analysis result for SHA-256 068a49cc017a08e3…

MALICIOUS

PDF

85.9 KB Created: 2021-09-14 11:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 56861b86fb2fb9045da6a1b3ba660314 SHA-1: a138f89528bb94d6b6d2daa0f329ed5be5643714 SHA-256: 068a49cc017a08e32a4a23836d8513c939637a2240bf246f170142d4e0a1c430
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate the PDF functions as a link farm, pointing to multiple compromised WordPress sites and disposable hosting, likely to distribute further malicious content or phish users. The embedded URLs and the nature of the link farm suggest an attempt to direct users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376f7089a1a---16736570021.pdf In PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/81297252834.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109050451296397.pdfIn PDF document text
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/fokuxilutidurevokafuxofaw.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210911214755.pdfIn PDF document text
    • http://rhoptik.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/tiruzazusagivolerumek.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/xifitijuwulominegabapi.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/70288744606.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/sejetikoguwubaw.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb5936a441---46493898132.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/marev.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/bl6815kagg1ofbogo7jgtp76g0/basipomigupux.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137d7f20c178---jovazigumedopafivawuzom.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/bezemi.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/kogozuxagu.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/janamivekopovabixepu.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/nusikuxonuxunadeleb.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/lunabu.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/dakarimemisufevujo.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/18515704565.pdfIn PDF document text
    • http://videlec.be/ressource/file/gasorom.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/82007706216.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=ggo+football+game+freePDF 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_off0000ef2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2B 16796 bytes
SHA-256: cd50832a7fd65cb586c48319921e909f2fcd4ca0a9d7d8dcb9bef925c7a5e4cf
font_01_sfnt_off00011a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6E 10372 bytes
SHA-256: c5363079ef8fb7cb5bdc714509ed090d04643208ada5823a6fbab588fb50ef02
font_02_sfnt_off000131fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1