Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39c8a3030e8f447…

MALICIOUS

PDF

144.3 KB Created: 2021-07-13 16:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 76ffa2031e691b5437a3affa5526fbd0 SHA-1: 9955e0e734470c2c7ac3af3326f2447e0c745d7b SHA-256: f39c8a3030e8f447ad9b669e845f1e2ae5eaf3ff5819e373160d6fb2d4c067ca
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms on potentially compromised or disposable hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://wastran.ru/uplcv?utm_term=ft+lauderdale+to+orlando PDF link annotation
    • https://airtelco.com/data/users/_/email/files/tikumemugubizedisi.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210614_FCB679E5ACFFFD83.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dc56b6d9e---nolomebidupajezubol.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/iosu5s4oq6vsjrdpkk828gi6v0/rorozimoxi.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/38252957163.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/2779e0531f0edec70298444f4b9afa86/xufivelodi.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d01fc85b76c---jazibu.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/94896723600.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/f70l5jj4eiifvc4uv02t06qrvd/9960409872.pdfIn PDF document text
    • http://proxima-design.cz/files/file/nepofuxepinarepa.pdfIn PDF document text
    • http://cpils.com/userfiles/file/48554955906.pdfIn PDF document text
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/befokosuwewasivisal.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/e54c92646b52f12f5f04ebdd7dba25d8/13557715928.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c568e15e63f---49823781631.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080e541c0863---16559657267.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/bgldq3fuor90jqhhtojk1ec9jk/kibufofezexurisijogomiwa.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/feb3b5f60be164bfd19b2a16cbf11d0a/59002054468.pdfIn PDF document text
    • http://statewideroofservices.com/clients/b/b8/b825a24af54c157c196cf52173d75bf0/File/xuxozirosebegizo.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/65e74718c5a9ad63dd5fef2c329d1e7a/juzixajisatutemute.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/lamexukot.pdfIn PDF document text
    • http://davisnewfoundlandfamilyreunion.com/clients/60627/File/88622477446.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_off0001d2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001eb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB01 19176 bytes
SHA-256: a9a60c9ad82c215a1009614a83494a86c2eaf46420ec84a7a634bfa5f475672a
font_02_sfnt_off00021d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21D97 10060 bytes
SHA-256: 8a4effc332edfa52fd39dcc316080fd90e4772ba4b0ffe0cf45d877f54a90b5e

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