Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff63653ddef2766e…

MALICIOUS

PDF

94.7 KB Created: 2021-07-31 13:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7dd6151ca3b18145e7b30bb5da4a56d0 SHA-1: 8cb1123c62121db7ce6e49592ff94b640165df7c SHA-256: ff63653ddef2766e2487c74e05539da68e8b75a6e23478f9589285eb84843890
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the analysis relies on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ba90efe9aec0d03156290d6d1c4f107d/sigerelezanekax.pdf In PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/tunatowole.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/7cdd5167fc340154ba42bd9e279837c6/jevefixox.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608536a54b879---zipebanov.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba1aa24a8a---gapesejasuwovo.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c32cd614b---59257472364.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/zozat.pdfIn PDF document text
    • https://zold-kommando.hu/files/71076697965.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/jowitaxotibezobunopobumes.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/qkk4685uuiltmdd7fctonujsi3/badel.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/03152736f4828b9fd352314402a94eff/fukuvagomowo.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/lajokiretijevizipopaf.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16092fe8fb93fc---92928652792.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/rvu8s96f69n8d4rivm915a1206/22999418191.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d04a9239452---pepefaminufigereke.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/83671293104.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/21689842925.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/4b22f84132260eabed65a287b56121df/luvup.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3a2bced95---96829286404.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/87220421638.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0102be53da---velifuvawatafejetotosom.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/dudakiragaf.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0b563d3113863bcf0c3c7b12fee4eda0/bavivurikebasifixut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ctip+general+awareness+post+test+answers+2020PDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/8785eeede7440c7006af05a28b689a71/bilipavilekopuxelet.pdfIn PDF document text
    • 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_off00010eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C8 16980 bytes
SHA-256: b00e8d5a7028052d319e2f1d9108d21ec09693cea7c86d351509f4a0a0b29344
font_02_sfnt_off0001530b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1530B 10784 bytes
SHA-256: fcdd356a0ba008c38817d97d6123d5c6cff99df8a715e71a556e89e3e99fc165

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