Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d98864ee29bd905…

MALICIOUS

PDF

89.1 KB Created: 2021-06-26 07:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 71fbf8531e9e013ad2afd668973523d1 SHA-1: 083269511dc8d21e2dc3d3ab7e808784650e4d58 SHA-256: 3d98864ee29bd90558e4279f29f439aa8062313a1f0c1945b9ef2c6473a569ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristics indicate that the primary function is to redirect users to malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://smidgel.ru/uplcv?utm_term=eastern+blue+tongue+skink+care PDF link annotation
    • https://ringid.vn/ckfinder/userfiles/files/73857893871.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/9d49099d642c2d90bb789f47052ac90e/tijutemakixijawokikajol.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/0b6be62a280f36cd818bc57912936692/fejevebuwosibobesat.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/jexefuve.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/7i455fth8f0uq7sifo5i8db1je/73952522947.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/18749739283.pdfIn PDF document text
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/rexerevijisogixi.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/47351822441.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16077d4ccea4e1---fadipevumofuzowux.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/45a1df5712a1f2574bbb57264a7700b8/91924014211.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/93368323530.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/zijumobupemeratapusom.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/xupokirolarasus.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad8c7a1a1e---56452473417.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/2972bea4f46fc9332b5ec513cb5d0923/demufuzuzepupi.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/ce4b6467eb4f3174b5772dde0cf5aa6d/sirejiganuwefeganijokovi.pdfIn PDF document text
    • https://mmszke.hu/files/file/jariwepifubowirifel.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/jepexekafalonumamu.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/96451124168.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/1274vrsf22r4nfm8qkc0ns58a2/direpubon.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/be8feb6feb30143f0d3341282532a145/ropesuxojuraremujarulekez.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/8b8b4745a9aa4caf84bdeba497997436/kasekujakurupem.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ae82d8dd4f4---21597855772.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

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_off0000f713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF713 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2A 10720 bytes
SHA-256: 688b4bef71569b318609abcfa009f937810d5de74829483ad3fc305b4dab1e65
font_02_sfnt_off000127e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E9 17356 bytes
SHA-256: ad9c618efeae7526d809d6721d43837d7942e7855908163c45a12c2646fb4ca7

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