Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f6a1a1a6afccc8…

MALICIOUS

PDF

117.6 KB Created: 2021-07-20 18:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d2618a8add54f240de9c71a03513931a SHA-1: 201cdf5eb906568b7b3767803f1be4c54e9d11ca SHA-256: a5f6a1a1a6afccc8e211f31ada02c1618a399b78cd3b636aad4bc037bc450201
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to download and execute further malicious content. The heuristics indicate it is part of an advance-fee scam, likely using the embedded script to redirect users to phishing or malware download sites. The presence of numerous links to compromised WordPress sites and disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://jeansresource.com/js/ckfinder/userfiles/files/59271917378.pdf In PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/sorilexumagexiliji.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/dabuwajeta.pdfIn PDF document text
    • https://blugarden.eu/file/55460866953.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f5b4e0eb2---97601256170.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/a74b260273407e0413fa1e21780b85c7/zosoriv.pdfIn PDF document text
    • http://exlluprimebrochure.com/ckupload/files/86971409683.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c344ef6bd20---lurerinekijerisipomumiguf.pdfIn PDF document text
    • http://unsersohn.ch/images/file/raxuburor.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b051b5b4253---jozoxovowuvuwefexat.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/10a885c61f49cc10d9b71743865e2a25/xazunijotas.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/sajidiwusawodomi.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/75736141702.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082909c221ab---77336585507.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/38484131356.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/59519873433420897894b784dc90bcde/borinazegimalivuf.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/c13c301ea2e0eb58ce248521ac331fd9/lekabo.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/kixidosuxedojikudax.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ca211e001---38935696877.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/92113900802.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088336fb00e0---91875444823.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/71990413334.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=neilson+joinery+superstorePDF 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_off000166db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166DB 10404 bytes
SHA-256: 43af83afcb814850e322d4ffb931504bc9fef9f4d2da9f303ede1914bbe9fe5a
font_01_sfnt_off00017e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19699 19168 bytes
SHA-256: 391b8945a6b8e929b947315874a67c058602c5196849e6a335558d7a309ee946