Malicious PDF — malware analysis report

Static analysis result for SHA-256 970eb9645060b866…

MALICIOUS

PDF

91.6 KB Created: 2021-07-03 09:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5fd3e839e24bff4bc226131e09456ee7 SHA-1: ff170b0e4747d707594b895f788fdb0ec0d02a67 SHA-256: 970eb9645060b8661ebdbb36da63dbe0d730efdccebc1e38b753ba750ac60328
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were directly extracted, the PDF structure and link farm heuristics indicate an attempt to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/vte699epu731s5hno6p5ge2mag/gorujatezokor.pdf
    • http://tanphatinst.com/vietkiendo/upload/file/93268721832.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b386e572b1c---kijoxelowufix.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/df35f58083468a8b57ce16a81f8d0136/69198868946.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b52320f43---94600214512.pdf
    • https://kurishupally.org/userfiles/file/roridil.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c45d220296---21151120264.pdf
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/0338s8040d19i8k8sb0ov2anfh/gulufi.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/28bea75885pguh6k0i57n8bbdn/sowulejek.pdf
    • https://bselink.com/userfiles/file/65650747401.pdf
    • http://peaceinsrilanka.lk/userfiles/file/kodif.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d20b50b7880---ligijitisise.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3b08149a6---43687203126.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7d55a4b76---47930929076.pdf
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/tedaxexafilufosalenomudev.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/fa1b0100030e1d4ae3d012463436d326/4463481305.pdf
    • https://marmarases.com/upload/ckfinder/files/51258847078.pdf
    • https://inverpalmas.com/aym_image/files/jeremukutulafozotofo.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160851e0b57357---zasivijadujonijugus.pdf
    • http://taiwanglassgroup.cn/userfiles/file/sodunaxusikomolefifidabi.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4b16a02e040cb49344b6257f960ec7ef/netifodete.pdf
    • http://bulmarconsult.com/files/97543736000.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/3c4a5a03f731e4d863067a7dbfda1834/gimunigufabu.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/cm9sfg8a7f44bs1aonc6fpl194/jenoxoteribolagulabed.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=yamaha+15+hp+4+stroke+outboard+owners+manual
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000facd.bin
96f454ccb1b16b68f867dbf55ede00231698e961d316cfbcc344ffc656de23a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFACD 16812 bytes
font_01_sfnt_off00012696.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12696 16792 bytes
font_02_sfnt_off00013ead.bin
70b884a2951718a3a6f70e8c45eaec3de9e5b8c6d4279588b9704a6b097795ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAD 11232 bytes
font_03_sfnt_off000158c0.bin
e3a1ca7fbcde87b6e2bc585668cff1a50452d2a09c95c546c16e9f90aebd6500
pdf-font-stream PDF embedded font (sfnt) at offset 0x158C0 1636 bytes