Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bf17d152efc4084…

MALICIOUS

PDF

74.2 KB Created: 2021-02-14 04:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 537f255a38469b73809bf18c932dd523 SHA-1: 0add34294bbd87a4e04851271133a3da07c1bafc SHA-256: 4bf17d152efc4084578fa4850cafd7cf30636edd53a86e9e5d691e1f509b4bfb
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/aws?utm_term=spongebob+squarepants+free++wallpaper PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484633/normal_5fe062b4b4c96.pdfIn PDF document text
    • http://soluzixod.66ghz.com/arc_hydro_tools_10._2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445735/normal_5ff6648fe2dbb.pdfIn PDF document text
    • http://sekizabugurewud.iblogger.org/best_baby_heartbeat_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/f9gg1gh/fepatuxipitupeki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392444/normal_600f0a6194a9d.pdfIn PDF document text
    • https://cdn.sqhk.co/xakatikakizi/TRtWfji/hurricane_outbreak_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365576/normal_5fcf05149537e.pdfIn PDF document text
    • http://narelarijejale.iblogger.org/sikuwukojisonuwoxeroke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_600e306fa3319.pdfIn PDF document text
    • http://xijafagupigor.22web.org/12877575256.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485176/normal_5ffc2ff882b00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiwibijamexol.rf.gd/guidelines_for_food_stamps_in_michigan.pdfIn PDF document text
    • http://kunaraxanoxun.epizy.com/58699831283.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/2205028670.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/body_worksheet_for_preschool.pdfIn PDF document text
    • http://zonadomafi.rf.gd/assassin_s_creed_identity_apk_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/ccleaner_professional_full.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_off0000e504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE504 5532 bytes
SHA-256: 71ad7e29b811591b806f8b73dec6e0e370fbf0fcc8980d57aed644a189b39203
font_01_sfnt_off0000f7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F3 10512 bytes
SHA-256: 577a2c5afa2bc8e8e038b2f4f69235550806b7fff41838d92dc7815a45ae894f