Malicious PDF — malware analysis report

Static analysis result for SHA-256 f003458b902adb6d…

MALICIOUS

PDF

79.4 KB Created: 2021-09-22 23:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ef83393f2573e9fccfeb2b82a44d052 SHA-1: 4d282cdda3f7d2cddf213a8ccd752b023c35c5fe SHA-256: f003458b902adb6dfacffbaf07ec60ba1a48bd2593aa2e6da201adf62a7cc54e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and numerous links pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content. The presence of a link farm on disposable hosting and the use of compromised CMS upload storage further indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/f2q2vpabkdl33611t5h6n7gjr4/tinagezoxajavevevovivopu.pdf
    • http://primebrokeragetx.com/ckfinder/userfiles/files/6687805705.pdf
    • http://residenzaeden-albisola.com/userfiles/files/48909606973.pdf
    • https://eslms.com/userfiles/file/lotobex.pdf
    • https://qeyeoptical.com/ckeditor/ckfinder/userfiles/files/50619571504.pdf
    • https://aonetreks.com/uploads/file/jasirezobifigox.pdf
    • http://fsgpj.com/upfolder/e/files/20210908092228.pdf
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/mumedugut.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/6e8c7a7273983fb891c3b2cc112a2658/kuravurikoraxorog.pdf
    • http://homestationrealty.com/userfiles/files/timipidarifazubawenodet.pdf
    • http://navigator-nsk.ru/userfiles/file/9588139735.pdf
    • http://korea-labels.com/ckfinder/userfiles/files/kufopubemuvepuda.pdf
    • http://swaminarayangm.org/userfiles/file/48466007848.pdf
    • http://phunphu.com/userfiles/file/6805928732.pdf
    • http://idolyokocho.com/js/ckfinder/userfiles/files/likisofexezezunifax.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bef4d32251---52895469592.pdf
    • http://scard.vn/app/webroot/uploads/files/kivagisibamoduvuvubinixu.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145a6b555b74---kopovukamepibokinumoxu.pdf
    • http://bobas24.pl/Upload/file/58351882216.pdf
    • http://premiercontractinginc.com/files/file/bajivotovat.pdf
    • http://bjyhyy.cn/filespath/files/20210920074813.pdf
    • https://thaiahpa.com/flash/files/72854167015.pdf
    • http://mamolenasnc.it/userfiles/files/22773148977.pdf
    • http://hurtmar.pl/Upload/file/93296445457.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=vault+apk+download
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d346.bin
f85da25b76e4c0f1c8562e52ac2282b39d31050e1240f2ec86146e6d105027cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xD346 17836 bytes
font_01_sfnt_off0001011d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 16792 bytes
font_02_sfnt_off00011934.bin
18b71566db99fc619bebcf1918d8f1ed9fca3b120ec1889c0e6103973321b121
pdf-font-stream PDF embedded font (sfnt) at offset 0x11934 10140 bytes