Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ad3f693b503093…

MALICIOUS

PDF

92.3 KB Created: 2021-08-21 05:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 82331bc4edbae79c88f196b9e53ae32b SHA-1: 5dbcad21a05298292016540ccae49cc68c0f336a SHA-256: 10ad3f693b503093f08d820556563fbf343372bb4608c1359a0d74035d05740d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a lure to download further malicious content or conduct phishing. The primary attack vector appears to be a deceptive link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pistant.ru/uplcv?utm_term=google+maps+driving+directions+bc PDF link annotation
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9c1c80734a---41080308286.pdfIn PDF document text
    • http://le383.com/uploads/files/26447606377.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/95474723969.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/77451393252.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e68a7c8fe49---vorunafepi.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/xupakisu.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c9272cb0a---83750786750.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/91987594222.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747c875d06d---xolorijiriwovuwoxokonax.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/94970939305.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897b1575899---jizekuxuwakegexitibe.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/26974757390.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/bvs9v1sem44a6mmq4g9q3e5okb/niririwu.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/10491303938.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/4514207262.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119b49db91fc---58143151512.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608aedaa36c85---2067096747.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c377aa9b6f2---zosogegalofenubuvafar.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/kudavulekabupogoz.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b03536da9bd---dijuniwute.pdfIn PDF document text
    • http://dhs1970.com/clients/9/98/98bceae81adeaace0f0761aa7b0d12fa/File/39945936420.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/18828966130.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_off00010665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10665 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7C 11100 bytes
SHA-256: 79fe326328be86a4a73e6a6d3bcf220e46c8589264c2ee9ba8d72c78c12b39d1
font_02_sfnt_off000137fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FD 16716 bytes
SHA-256: 828ea62127caf2531762f34391832d1355d1f53782a000927fbf89aa6b7a06ae

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