Malicious PDF — malware analysis report

Static analysis result for SHA-256 627b9ebbd5606e12…

MALICIOUS

PDF

71.8 KB Created: 2021-02-21 07:58:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: c35c94fa38772abf115496abd77a4213 SHA-1: b473969901b21c306892b1291c346053bcfaad9f SHA-256: 627b9ebbd5606e124fae2805ee23232a3b7ace4b4f641e058d8e1fa9eb5c2664
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://seumenha.ru/123?utm_term=what+is+the+city+of+omelas+like PDF link annotation
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/cbc0b390.pdfIn PDF document text
    • http://lisojuribopuwad.22web.org/aol_mail_on_android_not_working_2018.pdfIn PDF document text
    • https://jagewimaw.weebly.com/uploads/1/3/4/0/134012974/gosetobusak.pdfIn PDF document text
    • https://zolalaroka.weebly.com/uploads/1/3/4/5/134591985/juxowipokuvubefo.pdfIn PDF document text
    • https://vusokozederik.weebly.com/uploads/1/3/4/9/134901716/vezalerenepowaxiw.pdfIn PDF document text
    • https://cdn.sqhk.co/tizadufof/UtGggFh/gamezapumubazigamojadig.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/aojCvjj/how_to_not_talk_back_to_your_parents.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuxamivim.epizy.com/batikubunutuzusivuxefa.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/kalajuxawo.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/pathfinder_bestiary_portugues.pdfIn PDF document text
    • http://temusifima.rf.gd/ansible_tutorial_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/rofebufezefixupe.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/wamusus.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/logo_quiz_answers_level_100.pdfIn PDF document text
    • http://rilifufamorupud.epizy.com/abdullah_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/logelimuredatofimomul.pdfIn PDF document text
    • http://kudogal.rf.gd/zarako.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/frozen_cartoon_full_movie_mp4.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_off0000dc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3B 5204 bytes
SHA-256: f610d85cce0eb3659f92cd05d7116b4ce5cceb450d4e7de5312b467c23a934d1
font_01_sfnt_off0000ede4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE4 10688 bytes
SHA-256: cc21d9d338db485fdafa364280cb853f0617b47a95c03ee9993ba0ec97bd4456