Malicious PDF — malware analysis report

Static analysis result for SHA-256 d737dd7d620bffa0…

MALICIOUS

PDF

101.2 KB Created: 2021-03-19 10:56:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b5a37a511c165914eb670d4eaa374cdf SHA-1: e0e34b53671748701ae57269a3544c58338a7e6d SHA-256: d737dd7d620bffa04ccd7ca50d80eb3f7c2d9b719e5559278b07f607a9e99580
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to `https://yafferge.ru/award?keyword=b+arch+question+paper+2020+pdf+download`. This heuristic, combined with ML classification and ClamAV detection, strongly indicates malicious intent. The embedded link likely serves as a lure to a phishing page or a download site for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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 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://yafferge.ru/award?keyword=b+arch+question+paper+2020+pdf+download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5fc6b80963021.pdfIn PDF document text
    • http://daduriwikoniza.22web.org/xolepenasujigelujut.pdfIn PDF document text
    • http://nesobaka9.xyz/browning_trail_camera_btc-_5hd_manualzr4kg.pdfIn PDF document text
    • http://vinnipoh.fun/7979560449y5ycp.pdfIn PDF document text
    • http://edarudost.online/acer_aspire_5750_power_jack_replacementrgkzr.pdfIn PDF document text
    • http://milanomodaitaly.site/best_islamic_ringtones_for_mobilep6ihv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453540/normal_5fca767d1c4e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460688/normal_601e494e9c43d.pdfIn PDF document text
    • http://mojofaza.mypressonline.com/algebraic_expressions_word_problems.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414156/normal_5ff79d7a62176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_601aa961df106.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378856/normal_5fca68083f5ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408878/normal_602d743f83e87.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/texuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fusuzuveraku.epizy.com/ludowe.pdfIn PDF document text
    • http://fokobawenola.epizy.com/getaruxetiwavavexozepeg.pdfIn PDF document text
    • http://kojuvubij.rf.gd/jodiji.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
    • 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_off00012fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCE 5784 bytes
SHA-256: 8fcdf39edd7ce5656019742dc7266be7e8bff734cd711cac923607b8328f6127
font_01_sfnt_off00014390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14390 13080 bytes
SHA-256: a2980a0d2f735eef68022d1d4f86a87b3e33561986ad31386e984f4d4efab642
font_02_sfnt_off00017069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17069 16120 bytes
SHA-256: e7896e294a157a572232a2b0d9c9f47884b91d0a08665135f2d7236a531997e2

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