Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6a217aecdae8e9…

MALICIOUS

PDF

177.1 KB Created: 2021-06-27 22:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f36cef0120e7afd807f2f4bef16e0a87 SHA-1: a571732da56293ae63d47ab1e238d45d28e5d459 SHA-256: 9c6a217aecdae8e9f6c469f6fa76930fc895154adb16cfe540ed02a0df8ceff8
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent is to trick users into revealing sensitive recovery secrets or private keys. Numerous URLs pointing to compromised or disposable hosting are present, suggesting a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 http://alexanderkanevskyartgallery.com/clientMedia/file/24964323609.pdf In PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/0h0uf4qi9kgjvikl05ju428132/4527509527.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/08983f4bf4606f2592f1dc924d0551a2/kagamoze.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084029c626ed---58356968261.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160853236ec0c8---77377213279.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/laxaxujematabaxutosoj.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609458ae041bd---1480660560.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/561dc263b559aacf5ca638be5a0f2844/67814113706.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf6c4bda70---belavububaziki.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/nusajivubekifiponigina.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609426c309d32---zegiweja.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a8a32b7cd---69993956245.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/xabowirofegabat.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/67011af940efb345e23cccd9d52401e2/76756265593.pdfIn PDF document text
    • https://rendiamovisibiliglinvisibili.org/file/24800050455.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/rarutakibitareguvenaxi.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/90c47c569437ad26eac767cb973dd8ac/nikofibuvuke.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7379b0a18b---19470690737.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fa1ad6654---24619876911.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/l2lifr1gr0pd9s282c4tq4qr3k/22297679275.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d25dbb3aa0b---wokumasixewas.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/21171139777.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6ebe1a749---6429417564.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/vijufasivedek.pdfIn PDF document text
    • http://bosch-service-center.ru/uploads/files/44807269265.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=computer+networks+5th+edition+solutionsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000250d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x250D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000268ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x268EF 10936 bytes
SHA-256: ba6fa753127697c5227f0d22c663b4f867a792e67dfa3d54c249346c9496693a
font_02_sfnt_off0002822d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2822D 19640 bytes
SHA-256: 4557761c665fa9ccd634a00d391669215807c75fe30e4a4ab32ea2df5a537cdc

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