Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a60947865e3477…

MALICIOUS

PDF

84.8 KB Created: 2021-09-05 12:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 74d8af46f2cffe2cada4a1726770c918 SHA-1: dd4b771edb0e9c9bb22057763cd0898de8a287b3 SHA-256: d8a60947865e34774586ca164d7edc246b0374fb899bfe956ddfabb9b0f8c24d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://khodahoanglang.com/admin/webroot/upload/image/files/dakizumu.pdf In PDF document text
    • http://dxline.eu/userfiles/file/28500751929.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a82bcd96d1a---jusesedopobiwixufatov.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/61046578254.pdfIn PDF document text
    • http://mamnonhieutrung.edu.vn/ckfinder/userfiles/files/rofekifaboba.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c5e210b76---11897187288.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021043023533053.pdfIn PDF document text
    • https://ive-cal.it/file/7226503399.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11f587fd6a---fizolorofizunuru.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/wogotoxasaposivipajixifa.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/0cdd276358534c127a9b5699e41337ae/22442677217.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/77643574203.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/nabopoxumojodonigubon.pdfIn PDF document text
    • https://equinox-e.com/upload/files/jitexojipotunipaxo.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1611935d012544---tagave.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/5061482867.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160d43deacc7b3---41788308966.pdfPDF link annotation
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073e338d74f9---79717641228.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/36914393466.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b93614edb---37234335537.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/zujonapeve.pdfIn PDF document text
    • http://sfipl.in/userfiles/file/51110128471.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/a7318f5a4566cb9e0888e49efe466696/rajofu.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/ef5992dd93c93a9c345173e241cb80d7/gaselarupi.pdfIn PDF document text
    • http://dgjst.com/upfile/file/88506450159.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/8622266a08bad59ca2f8b901d2e35f8b/rinamudugisiwaxosuwaje.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/d374d7de3a1d414740653315bd4a6346/vuxutotijujuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=luella+miller+mary+wilkins+freeman+pdfPDF 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_off0000e214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE214 10792 bytes
SHA-256: 32f29b29414eb66f7182a362784d91c6ba6eb4f65726979db6390bcb69657db8
font_01_sfnt_off0000fae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 18596 bytes
SHA-256: d8c9dba5606c7203e853fedcf5ccb299c77b69be7cb1efe309b4114c7b954e95
font_02_sfnt_off00012b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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