Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45404dc31015ad3…

MALICIOUS

PDF

70.2 KB Created: 2021-02-16 13:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d85c4eadbcf6b31bc566e80f9ceaff93 SHA-1: 7297b2002bccaab3fc6c4d1c277a2dd432210810 SHA-256: b45404dc31015ad3dc6eb54e0e6151be04f011042b7cdc390557d36015ae4844
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/123?utm_term=how+to+connect+a+digital+converter+box PDF link annotation
    • https://nodemudikukurev.weebly.com/uploads/1/3/5/3/135348567/b2cfbe2a58c15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500889/normal_6028a1b33e88f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368982/normal_5fccee636d132.pdfIn PDF document text
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/dukidetekupofape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_601e9696bf6ce.pdfIn PDF document text
    • https://gifaxopolipo.weebly.com/uploads/1/3/0/7/130739444/8972391.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469104/normal_6006bd1623152.pdfIn PDF document text
    • https://vatovuturok.weebly.com/uploads/1/3/1/8/131856009/piwelerobafefu.pdfIn PDF document text
    • http://good-production11.site/63816306033yj4rj.pdfIn PDF document text
    • http://begdas.fun/73079861911eyktl.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/ritoma/ziwupovarosefibadogomived.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/sports_logo_template_psd.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/satinilenidaxisofujikeda.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/despacito_lyrics_in_english_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/cetus_play_tv_remote_server_receiver_apk.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_off0000d6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C9 5252 bytes
SHA-256: c96976b0b2d4a46c3770116cbd4e6904deb4fb35172b59b45f96fd6d62b4011a
font_01_sfnt_off0000e8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CC 10356 bytes
SHA-256: eec9427c20e5dda4cf02adbd9408de64ec2535bf6893e1ce45cdde5f0a99bda3