Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f38084e806439f…

MALICIOUS

PDF

66.0 KB Created: 2021-02-20 08:18:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 92f1eab7c466fff79f350dde9a04200c SHA-1: 4c6d9a7ef297f63c0b69847fed474a7710de99c1 SHA-256: f0f38084e806439ffcc80828a6e225b510c9d3efaec71a35b7bff908eff9296f
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://druttle.ru/wix?keyword=geometry+chapter+3+resource+book+answer+key PDF link annotation
    • http://santaparker.store/81355015405gf8sv.pdfIn PDF document text
    • https://bekogome.weebly.com/uploads/1/3/1/4/131454098/7fb1c064159a.pdfIn PDF document text
    • https://cdn.sqhk.co/vedukosamo/hhNhjgj/steven_universe_quiz_what_gem_are_you.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/R3JQiiJ/56707839679.pdfIn PDF document text
    • http://in-arenas.com/folk_music_wikipedia_english5uxiw.pdfIn PDF document text
    • http://creditpm.com/converting_units_of_area_and_volume_worksheetpnbmv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485568/normal_5ffc1d562d77c.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/xuzakob/anti_corruption_act_in_marathi.pdfIn PDF document text
    • http://bimekikup.epizy.com/84797248982.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/malignant_hypertension_treatment_guideline.pdfIn PDF document text
    • http://ripazek.epizy.com/39358168783.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/61967574817.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/castillos_del_loira_mapa.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_off0000c493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC493 5736 bytes
SHA-256: 14437cb4ae672da332aed3237ba4d7c05cfbc677f7dfbffc958b68625f203c00
font_01_sfnt_off0000d800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD800 10452 bytes
SHA-256: 030972eaa34981e5b8c4634cac426ab877004ba5c29c38c568cb37f1cbd9e6fb