Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5c4d5dd256309c…

MALICIOUS

PDF

78.0 KB Created: 2021-09-04 20:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cd204e8ab0e66e10ddd0bd75e075e1af SHA-1: f25f9992e123881578ff2e706a7279f189b4e450 SHA-256: 2f5c4d5dd256309c3ab2b24c494ae497951c34b9e1673a98eef406deb88bb17f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://tonymusic.se/UserFiles/files/jodagizateranufilov.pdf In PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/zuneteb.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/e5516042adf34ef7d82c914bc5e87d78/saragagor.pdfIn PDF document text
    • http://atek-ent.com/upload/file/vubosivarub.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3833eb94ec417e264dc4116b34a3365b/givadiminavijiti.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/lejagefoxeropafiwufoxux.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/mipofil.pdfIn PDF document text
    • http://mytaylormadefamilyusa.com/clients/864113/File/koxila.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/83812003610.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/90922035476.pdfIn PDF document text
    • http://mamitobe.ru/files/file/26279308997.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/deguxitoredegeranedebugob.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160929da77997e---mowugowupukuluko.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/1051811977.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1611f3041b7a1d---bajekavudiliganipe.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/64462292380.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/zilaxakulugawozusavid.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///66326819779.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/33066805786.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/23454631876.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608121fb8e83a---zinefibumun.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/53a05198e08fc64b4a2e92b166889c1f/55390208433.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=conversor+de+pdf+para+word+on+line+gratisPDF 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_off0000cbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB5 17720 bytes
SHA-256: b8494557b28516a2962ee01aa9a5e159506da0c14bae2a2c995723ddcb7173e3
font_01_sfnt_off0000f97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11192 10856 bytes
SHA-256: bc8051e5b2170341ba92e4b02bdba87828e854436b52ae2348043f47cf8aa9f4

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