Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac14a47d9c1ef81…

MALICIOUS

PDF

77.3 KB Created: 2021-09-26 13:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c593dc7a737e42aad30246b15560a8e SHA-1: 48cb1857d76f18922670fc2bf21d758aae7d0359 SHA-256: 5ac14a47d9c1ef81e6a1093fe7d991fd9a07c4b6a13c78e3372998fd8a715ab4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further malicious activity. ClamAV detection and ML classification confirm the malicious nature of the file, strongly suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=putlockers+the+office PDF link annotation
    • http://jysfh.com/upload_fck/file/2021-9-11/20210911225422598642.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/butepulezinotefixara.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/64415014209.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/49092235356.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/56576156627.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/8f4f1effb7807b46ad5721e86d8391c6/fasojov.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/05fc244b40250b72bac3ba29f36b8cd4/70520259335.pdfIn PDF document text
    • https://grandiosieventinuziali.it/filesUploads/file/76934329878.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/37448220433.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/23212805836.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/litimavupizifu.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/htp4bajk39hbu1j1tvup6nj09h/xalifoju.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/29701914304.pdfIn PDF document text
    • http://apismorava.eu/docs/pokonegazawagi.pdfIn PDF document text
    • http://petswithlove.com/cvsprojects/SSK/Source/2.0.0/images/files/2165040727.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/35341839044.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613078e64ecab---suturapukasizagijenozolel.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16146463481bed---62146535464.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/36292094350.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/vadiwutafokonan.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/dcf8043642982bbfa63d898c788d3b35/jasor.pdfIn PDF document text
    • http://theshop24.com/userfiles/file/gojanizagevokupopigi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB09B 17108 bytes
SHA-256: 245cccf3a52df021d3b050b873eba01ae091f4124b8da7010b89c318c31980d3
font_01_sfnt_off0000dc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3F 10360 bytes
SHA-256: 988d2d00c1556c462166318acbf034d8f45d5371ae803ab1f4abc33164d913db
font_02_sfnt_off0000f3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00010be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE7 18096 bytes
SHA-256: 7328df1dc4a8db6b72138f09078e62efa9cf9fc1a26811c20daa4d0221aa2706

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