Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e86f8751ec9b446…

MALICIOUS

PDF

72.5 KB Created: 2021-02-26 02:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6ed628f0a804805f3cb426d996c65ec6 SHA-1: 2decbfb25b0fee406dadbfd89c837f0fce782930 SHA-256: 1e86f8751ec9b4461442c47315de0d5690e02d9dde66634533d1dbfbf4b20287
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/award?keyword=house+of+usher+2008+watch+online In PDF document text
    • https://cdn.sqhk.co/rijujonakuje/jjheMgd/ranked_voting_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/gchcZhv/zombie_invasion_flash_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423714/normal_6016fab23218d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486206/normal_6032203ff3503.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459914/normal_5ff0d85b76317.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480743/normal_5ffcf9dc313e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejomogilum.rf.gd/how_to_setup_airprint_on_brother_mfc-j4510dw.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/how_to_write_the_script_for_a_podcast.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/catchment_hydrology.pdfIn PDF document text
    • http://pefogitoveni.epizy.com/16582853902.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/bomaw.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/saruvejutuzajedeko.pdfIn PDF document text
    • http://jiwerefupuz.epizy.com/aradhana_stuti_aradhana_video_song.pdfIn PDF document text
    • http://gixarab.rf.gd/69962097024.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/zigofudub.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_off0000dc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9C 5488 bytes
SHA-256: 2c40548448f7a949fce472e2eef1e6ab9db6ea2b524e65b4c0969ff4a9243ec1
font_01_sfnt_off0000ef56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF56 10660 bytes
SHA-256: 1e0d11225387361efb3d9ab278dc511e263b504700b956916c1c21c78203458d