Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fdae1b603dcf9ac…

MALICIOUS

PDF

78.9 KB Created: 2021-01-30 18:20:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9d03c9ad7c250a8bd0643383e5a51b4f SHA-1: 571b7250687831197451154beb1b170c1b025acb SHA-256: 6fdae1b603dcf9accded187b85c670bca73192ecb7e9220f7f561357e1c71612
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely as a first stage for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=udemy+coupons+aug+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446638/normal_5fe7d79d2b463.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405195/normal_60026ab5356e4.pdfIn PDF document text
    • http://kafalogu.22web.org/81228715902.pdfIn PDF document text
    • http://fofafowazu.66ghz.com/report_burst_water_main_severn_trent.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388160/normal_60000b158dc79.pdfIn PDF document text
    • http://diletemofuvufu.22web.org/example_feasibility_report_software_engineering.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5fd7a51aa9b64.pdfIn PDF document text
    • http://xuwajofona.iblogger.org/28349074729.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474998/normal_5fe3d5e05229c.pdfIn PDF document text
    • http://rating-bookmaker.ru/zowubinivikozanixanzvi.pdfIn PDF document text
    • http://1cats.space/group_video_conference_free_appn5lr4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376625/normal_5ff5d7d1b7856.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tolimimagag.epizy.com/zapisugebikake.pdfIn PDF document text
    • http://rodoluvajepitu.rf.gd/revikobovuzad.pdfIn PDF document text
    • http://tozoxuzev.epizy.com/76163031832.pdfIn PDF document text
    • http://wuvasof.epizy.com/voice_recorder_ad_free_apk.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64E 5632 bytes
SHA-256: 98ee61ada10fd8189645277c89ca2930b42d460bf6ef3a99e5dc35fa173c9947
font_01_sfnt_off00010976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10976 11056 bytes
SHA-256: 3b6cfc406b5ab60ac2378a106d19bbe992dd3a5221c8d2085f074dc22f7de6b2

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