Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56b42e63cc3ea54…

MALICIOUS

PDF

86.6 KB Created: 2021-09-01 13:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 962a29dc5191e2e2f8001f16147428bb SHA-1: 1d0d2b8f11bd6d4c9769e7ce483cda0d6e929bc8 SHA-256: a56b42e63cc3ea54f4a69345c12a4d0d01a0d2f467bc03fcf9eb3fe46beca595
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of many external links and the high confidence detection suggest the document is designed to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://irlanc.ru/uplcv?utm_term=8th+class+maths+frequency+distribution+tables+and+graphs PDF link annotation
    • https://planet-for-events.de/userfiles/file/20010358607.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021821254501062.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfde3b8a8e2---nefanekisajepalazonono.pdfIn PDF document text
    • http://riversedgefm.com/files/file/15121990030.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/97094857801.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/49431858207.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/0qa3q07e9cgclkb4n1o2igg57b/33754650692.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/konezusubupawazeduwimakik.pdfIn PDF document text
    • http://klaaswester.nl/img/file/77291939013.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/10816228992.pdfIn PDF document text
    • https://paperland.bg/uploads/file/11405509009.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6024e3936---70361625554.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f641381fd7---rawefimowulanosawa.pdfIn PDF document text
    • http://bptramptour.pl/files/file/44519338980.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/35278062715.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/zozikolukurixubapu.pdfIn PDF document text
    • http://builderall.info/userfiles/file/liguwezubebezo.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/25553761533.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2718cdc1---rasikonanufolojif.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e11a81a936---nalulaboroxupov.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/ec70bfa8e5afaebb77d099259d327d4b/zirejevaburulido.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/pusutobupetazepal.pdfIn PDF document text
    • http://jfe.hk/userfiles/41141781837.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16125fcd3bbe1e---mositifexus.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c78881bb3---zonosimejekef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE913 11676 bytes
SHA-256: 77acaef537f79cccc6c599ef2b608cc01f2de1e05b141c8bd286e645b65f7529
font_01_sfnt_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C12 17780 bytes
SHA-256: 5a46276f5d64080ca63a7905d9f2fc72942b108ca6f500aeaad6766b485b19c8

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