Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d76f5d0047a0d19…

MALICIOUS

PDF

71.5 KB Created: 2021-06-30 06:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e2c5bd17c6383e84059b548cc6e7b7ce SHA-1: 5356c58791f302642e341553e643ad75e85d08bf SHA-256: 1d76f5d0047a0d199f6324e7b4b553f416a12301a6bd1c52714c721c3fd16a76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites and other domains, likely serving as a lure for phishing or malware distribution. The presence of external URIs and link farm heuristics indicates a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://garglob.ru/uplcv?utm_term=chapter+5+closure+answer+key+cpm PDF link annotation
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c30a1b7f4d---41298112.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/d775a0f6d18acccf2bf83e4ab8dfa63f/dofuwasowopelapaxifokof.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/a03bb2505125da7b2405bda120db2921/64566344428.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/68758646415.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2acef124b2---75311062450.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/os0rhfprev4sn2i1k2kv3b2qc2/binaborowiguja.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/b0804449e4928cf4096e18662bd03d9b/xuxudigigaxa.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/30255744130.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f37755853---talelidebaninewunelo.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/girovojilugi.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/10876752139.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/76103869635.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/nedipumexopekizef.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/3fc6f9b8b0cec07e68d6d4a35f376a85/8069045573.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/fosefegiku.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/27162511336.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/h3mdbd1cq3ni3nienv4rmoev87/59523971893.pdfIn PDF document text
    • http://midel.me/userfiles/file/rifavavomowenanakiwuza.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c9f093656---55773674369.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/ridonetirip.pdfIn PDF document text
    • https://tipresentoio.it/images/file/54158734883.pdfIn PDF document text
    • http://ahchala.com/img/file/teribuwodiwewofudam.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/josidupanuvivazodetuxuzor.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/84889198214.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_off0000b59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59B 15732 bytes
SHA-256: 54260c95992bee0d4ac691db535b3e6400969a42b2bb4dc1fb5d6a087a6e2858
font_01_sfnt_off0000dd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 11104 bytes
SHA-256: f4da1f1efc1219d1cc337f29a58b03f94665d331a414e25c568b756c3f3510f0

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