Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9c5c97f8447bd4…

MALICIOUS

PDF

85.4 KB Created: 2021-09-17 01:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9110c1313c72a533e0f19cad5431d5f9 SHA-1: df180c438a76cd6c4901c258e71425957281c5a6 SHA-256: 6f9c5c97f8447bd4ae020ef22315e461459b785bde39fe7d1e8795ff567b81c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to lure users to external sites, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=hay+day+hack+mod+apk PDF link annotation
    • https://tattica.byespresso.com/app/webroot/files/upload/files/manitijipiwewuzepen.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/jixuxisugi.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/3be3e1c49cb83fb8250fdb5d8eb22e68/64605676593.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109071534399559.pdfIn PDF document text
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/7635990695.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/90688939193.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/47021920092.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161325f7634e03---gejodizufuv.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16141a4d3400a7---vaguxugeseridepuvudip.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/jimarogebutaxerefer.pdfIn PDF document text
    • http://canadianrockies.info/files/file/60477018700.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142e7c92005f---pezutegopu.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/22765569676.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/c9d333168dd340ba4fa8c6b9b2b42aa0/jujiselejazototigoxugosu.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/5flrqvr9quc29jjdg62tb6e46g/sixamevi.pdfIn PDF document text
    • http://rurisnet.org/images/file/dubadegemojunapofewidumax.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a581c79f8---mowejebumojeruxijep.pdfIn PDF document text
    • http://fo-prefectures.com/pages/files/68138593865.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/5830305197.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72354722027.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/72276966088.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/71734781879.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613867e38acb3---pakalomawabuxasuwi.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/wuroxibipafosojezodev.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_off0000eb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10345 10236 bytes
SHA-256: e484462d1dcc4fb50f31608269a51c9fc26433f099bea91b32f02da7fcd2a7cd
font_02_sfnt_off00011a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A33 17752 bytes
SHA-256: 1e2cbcf2a5dc75f1004df02bb6dc9d3b7e397eecaf4c4809b95e424b97b6a0dc

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