Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9764babb540acda…

MALICIOUS

PDF

79.7 KB Created: 2021-09-21 07:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c56e4739f860dfd6c2b9a49d8c55bc3a SHA-1: a45f85e823b743824cca3c397e4409589745bb87 SHA-256: a9764babb540acdad4e77cd95d46e32551ed9e2b8744080670495fa0de3e7b4f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The presence of embedded JavaScript and a ClamAV detection for 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely for phishing or distributing further malware. The ML classifier also flagged this PDF with a high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://huntic.ru/uplcv?utm_term=roblox+gift+card+code+free PDF link annotation
    • http://motolargo.pl/userfiles/file/godewamuparu.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/99050019861.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/bomivikeko.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/84679504241.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/narabiwubotajugasebef.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-5/20210905170312738864.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/11354118219.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/32952021537.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/67540519678.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161356cdbc700d---jelefanala.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/kegajobidite.pdfIn PDF document text
    • http://adice-area.com/pictures/files/19718696703.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/tuzudufidilogibutir.pdfIn PDF document text
    • http://hoangnampte.vn/quangbasanpham/app/webroot/upload/image/files/judume.pdfIn PDF document text
    • https://tndvn.com/js/ckfinder/userfiles/files/zoguwomenopugawubanik.pdfIn PDF document text
    • http://ahaadesign-com-tw.sales-frontier.com/ckfinder/userfiles/files/mijuxe.pdfIn PDF document text
    • https://nwdglobal.com/ckfinder/userfiles/files/46930479092.pdfIn PDF document text
    • https://hirurgija.me/files/kelabasepili.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/2758086657.pdfIn PDF document text
    • http://jfe.hk/userfiles/lewukaxigizobi.pdfIn PDF document text
    • https://strings97.hu/userfiles/file/saxufofirivarovabugupu.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/mozikerasof.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136eb391250b---jileluxuwajafikanex.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146b3957e098---matelejebajubuzegogop.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380b364545f---9386547225.pdfIn PDF document text
    • http://ohmytour.kr/FileData/ckfinder/files/20210910_A40652A744EB706D.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/13400830110.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_off0000d1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E3 18188 bytes
SHA-256: f714f0c74def333af9f5cf8964dcc1a22875134eabf3ee7d3c2e6975fd1f046f
font_01_sfnt_off000100e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FD 10668 bytes
SHA-256: 5d284188a9feb2481f9217914869aa0f9d331e7f9d1ef1c26d2ff177df07ae9e

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