Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9fc1fa33af05e3…

MALICIOUS

PDF

97.6 KB Created: 2021-09-07 19:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e5d34ce7c848761245193c42d850d499 SHA-1: c188df72aeb9546b8fcdfb830ed75698bb88a881 SHA-256: ae9fc1fa33af05e3dcfa7ce8aa9767e10fe413672d9a44aa4067396f30dded24
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites, many of which appear to be part of a link farm designed to obscure the true destination. The presence of a 'download button' heuristic and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing and malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=xps+to+pdf+converter+offline+software+free+download PDF link annotation
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160791725daab8---xowagofon.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa668976fe---lupobezepo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3765e6374---59616852342.pdfIn PDF document text
    • http://glcore.net/ckfinder/userfiles/files/viniwatisokanos.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/tewozodatonuwotagusugive.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/59266694540.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ace87355d---63838307060.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/mizamitim.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080dc5dac9c1---mopizojizefujimiduloda.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16102dd9f06735---42154139336.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/fofevenizevusagojamiwi.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/21292811269.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/6478d2185767a3f12ee6fb15e8ca0cd0/takosomegifasu.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1335fd38ce78670aa814b8bb56cf12a9/47467791715.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb443955e9---36274388277.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/6375cd5be41a6525c599a2965a5934aa/siximaleligejavonil.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/66424610083.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef46386e3b---1067597805.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/97988630207.pdfIn PDF document text
    • https://huaienclinic.com/uploadpic/files/20407206233.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/e38cfb2f287c6813f2313207bd8fb667/zotokefarofide.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f9ae91138---93438166855.pdfIn PDF document text
    • http://samtekelektrik.com/files/99909682910.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_off00011749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11749 10772 bytes
SHA-256: b9aefddf3f7b690c5279c21f424e1729f9fb07f3d9fba55a72cdf01c0decab67
font_01_sfnt_off00013048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13048 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001485a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1485A 18596 bytes
SHA-256: 35b726175a4c816a4b174014d125ab080a2e7a397b7f48ea03a3bc368876769c

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