Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f93a8809d2d54ec…

MALICIOUS

PDF

60.1 KB Created: 2021-02-15 06:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 36bdcc220a71f7c7ff3b2edcd99e234b SHA-1: 07a5972371636073a7bd7e209d11f3301be13d2f SHA-256: 7f93a8809d2d54ec43e67111ada9c91e4d186a452bb2c4bcd197caf9058f9a00
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=ben%2010%20omniverse%20song In PDF document text
    • https://static.s123-cdn-static.com/uploads/4479224/normal_5fc5f34180cc3.pdfIn PDF document text
    • http://antonioit.space/xogerogefeturbbyb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488336/normal_5fd623a93524e.pdfIn PDF document text
    • http://mazers.fun/logitech_formula_vibration_feedbackwuyy2.pdfIn PDF document text
    • https://musisemikalig.weebly.com/uploads/1/3/4/6/134694348/6333237.pdfIn PDF document text
    • http://paypallsecurity.com/10880349429stcew.pdfIn PDF document text
    • http://jubemexor.22web.org/fowotozela.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488323/normal_60075fe46f817.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495400/normal_5fe14ff5e5559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5fe7e12edd726.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376380/normal_5ffbb879cacb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407299/normal_5fcc1c9ad872d.pdfIn PDF document text
    • http://mmamba.ru/affair_new_punjabi_song_ringtoneju1je.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_601f2a1b9bedf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tudexobus.rf.gd/niwawe.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_off0000b2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C1 5064 bytes
SHA-256: 51a6495b3eb1904cb947da6c85e9bd37ac2a962469a1516d8922d1f3456653ba
font_01_sfnt_off0000c3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FD 9568 bytes
SHA-256: 629cccf2180e28e583a8cc6dae4a0f5311310ce52e9f2de5848ed423dcfd67b2