Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c08aa9f003703a…

MALICIOUS

PDF

62.3 KB Created: 2021-09-30 16:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5297309c6359561fae62f729f8c0c850 SHA-1: 206fa82154ea7ff434a4da54595ef44260da4e6e SHA-256: 63c08aa9f003703a02c3dcf47231fa59fd243d4cb97fad00e223e57c9b0db3e0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable domains, indicative of a link farm used for phishing or malware distribution. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly support this assessment. While no scripts were explicitly extracted, the nature of the links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5364

Heuristics 5

  • 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
  • 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://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613d031e06527---zowegukonedaw.pdf In PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/39479767980.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210918225502.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/xixuteturifozi.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/dugalolemofodugoxotafebi.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153758546745---fukarefatodojokavejajava.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/joxigazenuz.pdfIn PDF document text
    • http://zjbfjt.com/upload/files/zuwowu.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210930_0DD5B3A03D0DA073.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/pnhiidph7922068te2tgo6iv47/85951588151.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/73982191482.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/fubitixuxi.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/jaroriwakidakobif.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/16744396766.pdfIn PDF document text
    • https://sausalito.com/wysiwygfiles/file/tagisixowalasozedanoj.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/31409928574.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/bakanibekibuz.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/52414632414.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/26447954498.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/gibukumozapekidijofuxev.pdfIn PDF document text
    • https://videoeffect.ir/data/file/73427534074.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396b5d6023c---saturumezuzajolexol.pdfIn PDF document text
    • https://svenjakretschmer.com/ckfinder/userfiles/files/rovelofo.pdfIn PDF document text
    • https://brs.jo/userfiles/files/nodikoram.pdfIn PDF document text
    • http://sadrokartonyhk.cz/images/fckfiles/file/kedujevitirunuzafajakox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=display+over+other+apps+permission+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB10F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC926 10840 bytes
SHA-256: af40369b7a290062890bbda96d2e2073dd6038605c66f98103923679a24f7d2e

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