Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a02e8f10a4ec0e…

MALICIOUS

PDF

76.3 KB Created: 2021-09-05 00:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 3781aa9b84fd2f4d7bb863c26ae769e1 SHA-1: 9a135fc404445acbe854294335f7201d0cdad013 SHA-256: 95a02e8f10a4ec0efe3320809e3dc145727ee3cac558914958ca10edfe55c1f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious File

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of these links indicates an attempt to redirect users to potentially harmful external resources, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no further context on its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b67619a31---kabobekipavad.pdf In PDF document text
    • http://avvocato-callegaro.it/public/file/67797641819.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/82589389865.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16071e3a8b8f0a---jatutasetixivibowo.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/xadok.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/328c3499486f2f0af16318baf96ef249/wetoj.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/sujutuxogofinizejufitazat.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/96451419900.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/2afc0145f997759d666fc8a46812ef1e/moliwumafutaj.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/dijefinazipera.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/wepefereriledenogik.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/eeb1c83a0613a0bcbe36b656286c12b7/29108558923.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/jedojunizodaruxexap.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161281080c23f2---revedubizijexavozo.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/be8d42fbf06215527190d0236a63375a/43634159470.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f223b033b---fulivinoviwebukip.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/64914424328.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/96264345553.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/86306620492.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/12088808243.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///lijikurupovinixo.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/sopuvuxutot.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/16241668106.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=antonym+word+search+pdfPDF 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_off0000c529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC529 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3B 17496 bytes
SHA-256: b360cd74faf806df40dccb60fca2502a6c15046ff395b1344ed95d9661d8f1b8
font_02_sfnt_off00010a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A60 10928 bytes
SHA-256: 257db014ba705c6f4e274914fc01ad4517479257f84bea22328c173ef878fff5

Open this report in the interactive analyzer, or submit your own file for analysis.