Malicious PDF — malware analysis report

Static analysis result for SHA-256 0213e6f5e55c0801…

MALICIOUS

PDF

104.0 KB Created: 2021-07-10 07:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 69672df3809866809071e0a4f20ce457 SHA-1: 191e0228a2770c69055f2aee3b4952baa3944c9b SHA-256: 0213e6f5e55c080111f73fbabb236b9391f7b93127d853e40f44b7a27f5e8964
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1162b9e29---15980033107.pdf In PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/c86a92a2fc031941da04a3c3bd261d8d/64484878473.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/e437a3372c75cf57725ddfffc1cc4cc4/59081691017.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098c042b8296---59291383708.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608728c7d8042---56089392237.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/fazuxaregit.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607677aed1ece---8899162831.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/fisar.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/burijema.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46279453066.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/68426785945.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779b2332c19---37934205750.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099df112f448---dagekaduzoketadurubiditip.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/58598221846.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/livuful.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ac81add40d7e92adb901ad3f79ed8932/22820248016.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/11899467431.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc65633abb---misomozubu.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/3f7rqfa7qs6it5adqul5pj3th5/2190594027.pdfIn PDF document text
    • http://fastgood4cheap.com/clients/4890/File/54443605094.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/93kktl5k6j71a4nucqp7imr3gi/ponogosagiginoxiwaragedeb.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/6779c546ee7dff178c312cecf7c6cabf/judanadexozogapuxe.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/apva6kgt9uofe8toogv4f7sda7/95664948040.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=apk+heroes+evolvedPDF 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF970 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11181 16432 bytes
SHA-256: cb6b0e5112ae7296f40fcd0de44e587c7c01c1d8bd49625f84cecdcfe0f875a2
font_02_sfnt_off0001282b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282B 30724 bytes
SHA-256: 7be20e26cb3d39e421c99bf8e317e51a78b99d4b2a39737b0032aac3342dceb7
font_03_sfnt_off00016cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CDA 10172 bytes
SHA-256: 5578d90abe3dcffab5faccc17fcfa43dc0fc42c1d16d9f699f096ed2dae7b223
font_04_sfnt_off000183c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183C1 3120 bytes
SHA-256: 51c50f16120b865ebec7c15976fc9d39c152c17da9a90adbc6e4834e4f43081c

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