Malicious PDF — malware analysis report

Static analysis result for SHA-256 949b29475adc66bb…

MALICIOUS

PDF

89.6 KB Created: 2021-07-10 13:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1a78fbb9926eb62f3a992b0e55518e5e SHA-1: 66a7b1e87347e415f37faadf50b14dda6fe5d5d3 SHA-256: 949b29475adc66bb0b36492d5cc5e4234c1d3cb11ec4ba6efbe33bf2346e0068
196 Risk Score

Malware Insights

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

The sample was identified as malicious by a ClamAV signature and an ML classifier, strongly indicating malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress sites and other disposable hosting, consistent with an advance-fee scam lure. The document body was unreadable, but the heuristics suggest the primary goal is to direct users to external URLs for fraudulent purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://nomylo.ru/uplcv?utm_term=importance+of+auditing+pdf PDF link annotation
    • http://lycee-elm.org/userfiles/file/97442409693.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17f630b7c0---12856205090.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/bslqqvdeipao85l7gvdbnv5pnf/degodawebir.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c032b4f2a---majakugowojenuxorar.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/39320109827.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/fbc9e39b72ffec0b3e29c6c546c3bfbe/mozovelilaf.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/53052812034.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/lfipp1i0mq8ra8gc4bnnb49jeb/8226029338.pdfIn PDF document text
    • https://mfdesign.hu/files/file/wopitanub.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d477939bb8---dapubu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dousbvugk8kv0ca32jc294j7f2/80393299773.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/67493377464.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160848b01464bb---tevikarufibiziponunor.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607e28be206b4---73163138017.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6140fa95eb1322caecccd9bcb0ec521f/95408274706.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/datinasone.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/tcp0ajchcpbl4mcm5aptdob0ls/lobogatozagitogazexum.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/xadugokibawobekemiwafe.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/2nkm8vcs9vvsusj0bl83ruc7hj/69427810174.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/484860e32ccb33f5913958edd25ca0ac/wusewa.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/9badafe4d3b621032644fe31516bd513/rulovelixitosudobiwapu.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a283a1a8712---koxejavoboburegugaxo.pdfIn PDF document text
    • https://vieiras.pt/imagensprodutos/file/zulibatizu.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/kanexifixavivetezaka.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe8dd52406---96025598663.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_off0000fc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11449 16968 bytes
SHA-256: e199f2ad1f099c454bf4473323cd67f4134fc0eb42066e581729f3511cca795e
font_02_sfnt_off00014096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14096 10800 bytes
SHA-256: ad0456e8149d62fedbf80ebe4439e215468462b1232eb0d7b6bcefc8cfb78a04

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