Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e402b1153fc216f…

MALICIOUS

PDF

83.6 KB Created: 2021-09-16 22:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 457d2fb6ecff6b63c524fb0c773fadaf SHA-1: 36adc2438f9f9679d8ba8f7cd442c037864f9f42 SHA-256: 6e402b1153fc216fbbbedf3949114e59a7d53a201c63b2acb71ebb6a4a2109b6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Credentials from Password Stores

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains or compromised WordPress installations, suggesting a link farm or phishing infrastructure. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or session tokens by mimicking a multi-factor authentication prompt. While no scripts were explicitly extracted, the nature of the links and the MFA lure strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://pistant.ru/uplcv?utm_term=how+to+get+a+free+uc+in+pubg+mobile PDF link annotation
    • http://ck-kutnahora.cz/gais/image/file/60946007446.pdfIn PDF document text
    • https://5uempat.com/contents/files/63779072500.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/fosowugazuverojer.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd1b5c5b98---95057209651.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/xojapojig.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/jepenelokapuboxerulizegov.pdfIn PDF document text
    • http://groupelamiri.com/uploads/FCK_files/file/nikisejabogesuboze.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/rulurajaturerodamusubalop.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/tewiwinaxonazivu.pdfIn PDF document text
    • https://snf.styleguides.ch/userfiles/files/91457740335.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109041111572733.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a3eeeca5c---52313829804.pdfIn PDF document text
    • http://odontotecnicacoop.it/userfiles/file/fanegevexigofulorakub.pdfIn PDF document text
    • https://cubic.is/userfiles/file/51864783524.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/vm5r3gf04gkgpm0o2gojsjed36/77042562433.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319b00a9d95---funurilop.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/89611563918.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/bopolivumulaw.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/30197064275.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/dotiroxalurizoxa.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/71311667092.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/fawuxozemojamusorewa.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/najuzejolotiga.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/gazigerevedafesipineguv.pdfIn PDF document text
    • https://limadelimon.com/images/file/zovutinulijifulewata.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/79667916164.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/xolepumitidawujewugabukax.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_off0000e02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02A 17900 bytes
SHA-256: bee9c381002e2f11c3c337f61aa8b2cf097dd566c264b0ef9b155f2d27ccadc2
font_01_sfnt_off00010e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001267a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267A 10972 bytes
SHA-256: fb519f6860c7df17ad2d45fd9efcb69f48460de54ef0b6d1abdd5eac20dc02df

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