Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fbf3bed47c0551…

MALICIOUS

PDF

83.0 KB Created: 2021-09-16 11:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 197d3ae1af5478c54cee80aaaf914a45 SHA-1: f55c18b42c3f37137e1d4a7091b96cb1c211744a SHA-256: 62fbf3bed47c0551a577f90ac02f40ed3a761f6c63766a2751740e54e1f43441
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially disposable hosting and are structured as link farms, suggesting an attempt to distribute or redirect to malicious content. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://evergladesharvesting.com/ckfinder/userfiles/files/xapejurejodibanulelonam.pdf In PDF document text
    • http://web5gstore.com/Files/files/kevuvovemumal.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/98733071120.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/73899641444.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1ba15bb6f---2024788963.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f99b283dbc---73562297152.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///pudinobabufanif.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16312322629202.pdfIn PDF document text
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/losagebeliwasigenasaf.pdfIn PDF document text
    • http://konberdbio.com/upload/files/12281446016.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/davozafexurumekominuzino.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/fusasavu.pdfIn PDF document text
    • https://bselink.com/userfiles/file/kariguwosaporudapujevaju.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/70586818792.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/xorapixemer.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/38805177781.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/todemimatisalur.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/pejobudimeduvoji.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/kubivivijeviji.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/27530209218.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/vivumogilazonisado.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/67746821487.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/66347069817.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=profile+visits+on+instagram+appPDF 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_off0000deb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 18472 bytes
SHA-256: 5a89e92c3bb3976aa2b3af46e87f3d9e8e68b1116128569dbc041d7f41eeb868
font_02_sfnt_off00012608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12608 10768 bytes
SHA-256: 10370dd9329f2c2b0458d53c5c564ce5cf1e569065d83274473f2cd1bf7cb650