Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1371df5479c0176…

MALICIOUS

PDF

80.7 KB Created: 2021-09-23 07:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3e4390f5e9993b1ca73eac7ea564b7d6 SHA-1: a12628c2df11a834d520073f42d9d781b7dc9971 SHA-256: a1371df5479c0176ed401b7f6d027605897053ccd70312465d0fbbd6aa1f31ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple URLs extracted from the document point to compromised CMS uploads and disposable hosting, suggesting a phishing or scam lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=masala+price+list+in+delhi PDF link annotation
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/316f1de420370a3c21c8bd06b0a8379a/virasedowaxoxumilokulik.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/5290693172.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142d15564674---43322450664.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/pokowaza.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/bexasakikobejugelaxevosul.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/ruzudujewaru.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/73609332977.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/49985043012.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/peragezilevegome.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ba95196418f7462d2be48848aabd6858/61019547173.pdfIn PDF document text
    • https://togeltop.com/contents/files/84763597675.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/tigiwomevibeturuwute.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/mutalozenazevuvarakaraj.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/xulabiluf.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/43290243359.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/72419726327.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/97283301133.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/57683893444.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/wusasazolojatigenovi.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/30993544728.pdfIn PDF document text
    • https://srsatta.com/ckfinder/userfiles/files/xusogizewipelorijudoxefeg.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a116ff21a4---4239095389.pdfIn PDF document text
    • https://renhedc.com/uploads/files/202109060746554027.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/zilipijot.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/dc32606c575f1c9b9f5cd31462b6e9c1/jugiwagofatir.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_off0000d61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 18240 bytes
SHA-256: 051b6aecacb823a434dcf80e767abf1ad41ad278c80e89048d698a185a6d1ee9
font_02_sfnt_off00011d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D50 10484 bytes
SHA-256: 017f8e936454762722d1768189e527d1f72f1c2720f8de2f6359be3be15dc252

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