Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa500ca48d66e393…

MALICIOUS

PDF

71.1 KB Created: 2021-02-27 01:18:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d25954ba924a321062321462fb2fb601 SHA-1: fd89e796792e52f94484eea29775ecf74304320a SHA-256: aa500ca48d66e3934ad51f9ccd14404f408d43aceab480b63accf5479b54d3db
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/wix?keyword=swagbucks+mod+apk+download PDF link annotation
    • http://cheatyou.site/44856538064do9ji.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/nufamizuwilijobavivhbvt.pdfIn PDF document text
    • https://pudakelujoroju.weebly.com/uploads/1/3/0/7/130739680/pujidakenasovit-pagagirisemuzi-kavupux.pdfIn PDF document text
    • http://mini-camera-super.club/894286487473r2ml.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/fTQqgiP/coolmath_run_23.pdfIn PDF document text
    • https://defelidiko.weebly.com/uploads/1/3/1/0/131070982/6211463.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/3355800.pdfIn PDF document text
    • http://smartradiobf.ru/sidililx7c1g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/4543068603.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/valkyrie_profile_2_silmeria_iso_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/49577995121.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/47561706150.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/utorrent_ing_slower_than_usual.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/61006303970.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_off0000d829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD829 5696 bytes
SHA-256: 101d3c1f36d65cb39d47ef3b732c8195c6e30df3800a18bb37144c43c5ed5ada
font_01_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 10652 bytes
SHA-256: 02e6aa8375b189e7adac33233db43d388161b480198468dfb1b5dc0a33b0ca0c