Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60ef2c517762a71…

MALICIOUS

PDF

86.8 KB Created: 2021-09-02 13:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1633e3c5e203aaebe7bdc35ba4113b94 SHA-1: 7e19ce5f3eaec508a6a8b604a1dd479994da7892 SHA-256: c60ef2c517762a71795d5d94bf6d880b26092f2c1c746c93e862c974611a5d9b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised or disposable domains, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://portsreunion2021.com/clients/b/b1/b1889431de095b9710a1303a3c619afc/File/81303449209.pdf In PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/gunamakataserafowowa.pdfIn PDF document text
    • https://technoray-medical.com/userfiles/file/xofesuseruwo.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1611ec8096fb92---petodujixiwudorovaru.pdfIn PDF document text
    • https://vpmemorial.net/images/file/19066955580.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents//files/41095163542.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/ebe2f40b9a5e28eee2ddbdf14d70f23a/lunodoxaledexamura.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16098bac83ec57---83585975927.pdfIn PDF document text
    • https://bczenekar.hu/files/file/20912070021.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608523eb4b74a---tiwuboj.pdfIn PDF document text
    • http://0985028898.kad.tw/kads/ckfinder/userfiles/files/donugonuwebawavitivojuba.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/67291195030.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/3ptll4ngc6o2k3o8e8o1quujps/94802724244.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/6828948928.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/69fd4d0d6a20a4ce71bd96030969e394/26206923637.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114f63590fde---19072265578.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/kituvojijewuxonitega.pdfIn PDF document text
    • http://passaicvalleyclassof1957.com/clients/44362/File/71202711265.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160865e811b36e---dawopoxurotup.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/zisexomewopuli.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/zimirifuzulevesobopof.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/d116dd48c1a96b91e4e83703eba01b0b/siwarulugujorelitaletode.pdfIn PDF document text
    • http://midel.me/userfiles/file/botuwimexupowozizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=cours+de+culture+et+civilisation+francaise+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_off0000e32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32A 22308 bytes
SHA-256: 2a66165b0276104082b749fee264a36899fb82938eafdd06bed40aab49e8abb2
font_01_sfnt_off00011bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001340e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340E 10812 bytes
SHA-256: 991960f29a3b118612d698434e87d2fb4ee6c0d9ae67c34a5fe5dc80de033b20