Malicious PDF — malware analysis report

Static analysis result for SHA-256 69829247164016f0…

MALICIOUS

PDF

76.2 KB Created: 2021-07-21 00:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3160e1675837b7b6ecad788b29616e5c SHA-1: fae39e1c2434c0458e68cd7a29e95dcf73064a66 SHA-256: 69829247164016f0df8559c703e51000a5e19085e5cb251555dbe051a8eedc8e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://www.aqsclimited.com/EditorImages/file/tinurulimirowamup.pdf In PDF document text
    • http://brainbond.ro/userfiles/file/bunekesewudelapix.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/1fc07bae2c57dfe89ce9efd20eb69c2c/fazokavorusuv.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/fewub.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/59205759036.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/75782702627.pdfIn PDF document text
    • http://rilta.net/userfiles/files/zenete.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/d304f1cb84fc74711fb4a5824480c40d/vanopekitetumag.pdfIn PDF document text
    • http://szpk.hu/_user/file/zetomi.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f50130e8ba---78806560047.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/82444395025.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16070ba2aee480---71118625951.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/00fb933e4f857291cb3bf29455b33db1/tidakigufedivewawoge.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/dosaneselurulasutomeson.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/mobigovajexofaranafiton.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/dugunamen.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/78386534073.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/147122453906d319c7fe6f61c8e9fa70/4725196780.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/4a6395f999ece052cbb4092e346f53a6/76681477759.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cc7b82a65---36563926797.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f303dbde4---bisuwusafiwagev.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/20176355818.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=ratio+age+word+problemsPDF 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_off0000c628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC628 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3A 16600 bytes
SHA-256: 7b988bf6195e7b0ece588e22b439c5460f604d8b04286e46e68fb7b544c95c98
font_02_sfnt_off00010988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10988 10900 bytes
SHA-256: b4c5ce43f171535f13534e80223015714108dcfba9ba5a307e49c52095356211

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