Malicious PDF — malware analysis report

Static analysis result for SHA-256 a063811778e035f9…

MALICIOUS

PDF

85.7 KB Created: 2021-08-01 18:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b3aedd50c23c1191b4f88d4251502ef7 SHA-1: 1f2f9f3d8943013a56d517254ed869550828380a SHA-256: a063811778e035f9a5d7614e68746cf3056a798e7833e45f82982f379fd73307
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, many of which appear to be compromised WordPress installations. The URLs suggest a lure for downloading movie content, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/02950bd2dadfb3a81bd13748af21e921/sesujodetadedefagobo.pdf In PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/56af5184f29e5785dbf9f1c13335fbba/20124897127.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/29897383726.pdfIn PDF document text
    • http://normel.org/files/upload/file/vefivezanabedipaluxi.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/geritukojijabed.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/57783286922.pdfIn PDF document text
    • http://vizcsap.hu/files/file/75919895967.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cea663a464---52130336220.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c74c354580---21659887844.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/38eeb43a3578d642faee09ca136428c5/50152997367.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/tuwifavevutojaf.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/fupexiraxajixares.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/59482581320.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/merexuwepavelanipubeku.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/makubafidif.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/e295931cd0909144c9cccdd83fb7b172/75832605713.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/51025155761.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/suil3caod3roq6q86h2rbcthqs/dusume.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c38bb85ea0---pavexumepinalodewenoruvo.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/fejimodugomoba.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/wulawoten.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907b31973e9---19125447378.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b92f89b677---zibagimoketu.pdfIn PDF document text
    • http://2016montemayorreunion.com/clients/e/e5/e530e98a7ee505477716bae2fe71cdef/File/46562870884.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=kis+kisko+pyaar+karoon+full+movie+download+in+hindi+480pPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 11524 bytes
SHA-256: 312f7f2a966b730475c9069389fd71a7c4333d659c9c303fb62149d84b07459d
font_01_sfnt_off0000ff85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF85 18024 bytes
SHA-256: af7983b3c08a8bb86f1e211fac3d440fffa884431c6ff041c187b4f0d521c203
font_02_sfnt_off00012ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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