Malicious PDF — malware analysis report

Static analysis result for SHA-256 08413f81f8d815be…

MALICIOUS

PDF

68.2 KB Created: 2021-02-19 20:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e42e34c3efeb1901bfd49e4229cc8e97 SHA-1: aed6a160b0ecfde23f38b57c6cba98ead0bc1c6c SHA-256: 08413f81f8d815be2418a88528f7ba154c3f3c228b8ebb3ac0d34e19c84e03ba
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/wix?keyword=onn+wireless+charger+compatibility PDF link annotation
    • https://cdn.sqhk.co/mezutowede/fig6ghj/75461903084.pdfIn PDF document text
    • https://zajoralesame.weebly.com/uploads/1/3/0/9/130969459/507164.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/bupaxomu/30854438221.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/daihatsu_sirion_2009_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/pikosorogabagubikubu.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/52392012432.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/fipekuxeminojiraliliwufa.pdfIn PDF document text
    • http://kamizarabogi.rf.gd/luxurabozamavavabi.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/famous_couples_quiz_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/lerezu.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_off0000c61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61E 5708 bytes
SHA-256: 91f7297b5e9fb102a2f9e46fe0f7e421f931b9543ddce192104a238564c31981
font_01_sfnt_off0000d96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96A 13596 bytes
SHA-256: cb7257d7e5baf198c25edc9e83ef0f05913a78ae5567f66dbf5216267dbdcf8b