Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ecd78a2f169436c…

MALICIOUS

PDF

66.7 KB Created: 2021-02-04 01:16:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6f77b11e0093d6e7dfb354d730a1a468 SHA-1: 65e18d3a9a0a98a003a33e2725bbc4fa815df774 SHA-256: 0ecd78a2f169436c480da0f15829e129bd7a3ba6b649e7eaa2228c151ab8dce7
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://bologen.ru/123?utm_term=rolling+loud+urban+dictionary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413236/normal_600a220deb624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482027/normal_600fac6a9cb71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476285/normal_5fc85de25068e.pdfIn PDF document text
    • https://betijefozivur.weebly.com/uploads/1/3/0/7/130776077/kuxufiso-digitaxo-pinesotez.pdfIn PDF document text
    • http://webmastervlad.ru/lozazekixemoxulebezias3ea.pdfIn PDF document text
    • http://krokoboko3.xyz/vce_to_converter_appoublz.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/kgdghji/download_apk_anime_face_changer_cartoon_photo_editor.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/tekken_blood_vengeance_download_in_hindidurv2.pdfIn PDF document text
    • https://konezevebul.weebly.com/uploads/1/3/1/3/131381420/86ad8530a944f76.pdfIn PDF document text
    • http://copytoshka.ru/72817782878rrw24.pdfIn PDF document text
    • http://bigops.fun/chinese_dragon_craft_preschool50vqm.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/panalipolifod/dagovagi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/togaf_architecture_design_document_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/best_audiobook_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/53821708839.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_off0000c7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A6 5180 bytes
SHA-256: 000bf3e588deb77d2feb440aaa9bd246aa313ce936bc4f90e669d753144ed4a2
font_01_sfnt_off0000d964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD964 10812 bytes
SHA-256: 8b923d96d651036e271fb9cf190166f73e7f4b74a47924328e9d137cc94b18a3