Malicious PDF — malware analysis report

Static analysis result for SHA-256 be978c29111bfe56…

MALICIOUS

PDF

81.6 KB Created: 2021-09-22 15:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 057fc74bf7e68e50a333510de44b43fc SHA-1: 77b3576c1d01bcd4112a5b79af9e1465b43ddf76 SHA-256: be978c29111bfe56dae9af68df92f1fc13204fb7c87f38db41caaa46c8a90eb7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://leganordavigliana.com/uploads/file/17594851320.pdf In PDF document text
    • https://kaktutzhit.by/uploads/files/24341252117.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613453c41ef94---77951595225.pdfIn PDF document text
    • http://salespate.com/userfiles/file/22361298059.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/90106130391.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/pemovaziwidatezategajif.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/doxok.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/pujinija.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/8748687089.pdfIn PDF document text
    • http://orderkai.com/uploads/files/4364635396.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/76942440114.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/dafowaboboka.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140498d0bd6a---nolupupob.pdfIn PDF document text
    • https://panoramabyty.cz/content/17017832987.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/722c6f051905ee41e2a34607549f4bf4/23516537006.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/48912047438.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/df9a87bf0a80900ec258acbb6eb3a87f/sugapajaker.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/54253697447.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614500f421aea---54625835393.pdfIn PDF document text
    • https://acerocorte.centralcms.cloud/galeria/files/76568175576.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/petobaxuwevufapesil.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/32007162641.pdfIn PDF document text
    • http://stilna-ya.com/_userfiles/file/10497658514.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/bojikisajowub.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/55061126052.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=ingress+ar+gamePDF 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_off0000dbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFF 17960 bytes
SHA-256: 67e2f52edeff0d63758fdd65fc644fc9f79b4b595174c3bd3fc119044d4c6ac8
font_01_sfnt_off00010aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BD 10048 bytes
SHA-256: d749db469d87aa4a76f4f9c812871a57e866af51a9e635e769c04cca0b11d59c