Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cdd7d9f2da62667…

MALICIOUS

PDF

83.7 KB Created: 2021-07-07 09:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e99ea423fb9cdae65c8596f787377d0 SHA-1: 2677db8f03a0377f55cd009210f8d76723e5cfd1 SHA-256: 3cdd7d9f2da626673974294bb499ec84720aeef9b12ed2216551122507d595ee
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to lure victims to potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/319f814b26ee419c4ea526895d11e6f8/40113451270.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16230449776622.pdf
    • https://eastmanllc.net/ckfinder/userfiles/files/zakoxivamodobu.pdf
    • http://stroisvias.ru/userfiles/file/miwatagogefukorenipiduzex.pdf
    • http://benhvienlaptop.biz/userfiles/file/67546142633.pdf
    • http://cga82.com/admin/File/fagifafineso.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/s0r50pmlpamrjo8fbkknoett6t/70124163941.pdf
    • http://vytvarnyobchod.cz/UserFiles/File/gapifubininovexovonorem.pdf
    • https://edcasys.com/ci/userfiles/files/doxiwirijejifugurarigezug.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8361c4bd5---dukutaboxoduf.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609c41f5d717d---22523059125.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4efdee6c---kexobowugipakixerefera.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/1h1eim0gfdjigj350ucj509fqt/mifidirusuzulokaropan.pdf
    • https://swagath.co/new/ckfinder/userfiles/files/35342575405.pdf
    • http://inglewoodreunion.com/clients/68690/File/82668537790.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/r0o7gjdejm6b3rkih626mqifvn/bifegikezuvonev.pdf
    • http://sun-green.nl/ckfinder/userfiles/files/pukagarunufuramutat.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075485f2533d---19804905335.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c46001a6d---17736741263.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609acd1e11988---juwupujel.pdf
    • http://allaboutdowney.com/userimages/befugalopile.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/28jbdo0k5e6ih670r1c7hcppv6/dipaxefewebisa.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c81acc017f---78148540735.pdf
    • https://subarini.ro/mm/file/13885445644.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086322195e69---24266704314.pdf
    • https://���time.com/���5853613/���england-���coronavirus-���reopening-���nonessential-���retail/
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=chicago+manual+style+website
    • 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_off0000e3bc.bin
65ff29e12776bf53f22915e78467967be391a1dd5680d74ea2478eb4ab55451c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BC 11048 bytes
font_01_sfnt_off0000fd6b.bin
dc010ff6946fe657a47023ef5dfcef2bf35ad1da3551c828284e994ae0738f6b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6B 16832 bytes
font_02_sfnt_off0001296f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1296F 16792 bytes