Malicious PDF — malware analysis report

Static analysis result for SHA-256 7756f41d73377d94…

MALICIOUS

PDF

85.3 KB Created: 2021-07-02 11:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a61c6737d622836edf8495359652183e SHA-1: 60080dfc40bf9760b246d8b76c4f25a9c0c56e39 SHA-256: 7756f41d73377d940dc5c5a252d3f510a16a87e9ee3435ec23eb1e1be34e64c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains numerous links to compromised WordPress sites, suggesting a phishing or malicious content distribution scheme. The embedded URLs are hosted on various domains, indicating a broad campaign to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4276a243aa---41221063851.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acaeadad41b---wukipu.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/3ffd78a70af333b27bd8b848b5ee57db/62271274877.pdf
    • http://islandpointfl.com/userimages/rozasenusegedax.pdf
    • http://vietkinggroup.com/uploads/userfiles/file/pegivifaxutujutekezu.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11b499f084---xasawopeju.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfcab73237---36648569334.pdf
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82436093979.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/i2aj39j97vpmqr0famsvg9mki1/45737786221.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/qbr9clvsngnvrft7dsb4t355qe/46453416432.pdf
    • https://bursakaynak.com/userfiles/file/14972207260.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160794601be2e1---99354043972.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/49b3h2o817d53u9i5i9g2js2jb/88018536868.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/1f14bb1448a19555be25ea5098bdd77e/folebig.pdf
    • https://anakmeong.com/contents//files/gelup.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f31a5c387---zugibelepojon.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/361472ce8521bbc5daa84d2358124286/vowofesoxuleloluveniluru.pdf
    • http://novussiteyonetimi.com/uploads/file/xuminow.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c4c395efe---99870728749.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/8ac8fc5d7061e852b2e68aeb8e3515ae/70574732955.pdf
    • https://jdlpartnerss.com/userfiles/file/vedoj.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b1f677398---76326298779.pdf
    • http://medi-sen.com/files/files/zenumiz.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be882519ee---podoreduwivilenazi.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/i0t0h15f6j8m2j9utug8lgm193/83246967786.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=2+point+perspective+building+drawing
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d4.bin
9ee7bdbda238c9cb5c7d03caf7d6434ba55db5e1fc2d36ec6f838ee3532a646d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D4 17172 bytes
font_01_sfnt_off00011627.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11627 16792 bytes
font_02_sfnt_off00012e3e.bin
6b8794fa234030dccce145de464d4de4930bf790db9d7347a80d53edc65f351b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3E 11104 bytes

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