Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3bf77a1c9dfb318…

MALICIOUS

PDF

71.8 KB Created: 2021-03-02 01:08:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3cbfd3c4d99e4cbde60f7883e379b730 SHA-1: 0ec94dc523741b2ee3688956bf1f7bf794b72df3 SHA-256: b3bf77a1c9dfb318077cfca91b7bb6be93b76520b3b411ba1b1de589d86e720d
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://lozipotod.ru/wix?keyword=compound+events+probability+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/zaviresodew/thgJnj4/box_office_collection_of_hollywood_weekend_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/gexedamej/1VS6hjg/48648624349.pdfIn PDF document text
    • https://vazexisosumufil.weebly.com/uploads/1/3/4/4/134465451/wuvefege_xelejunos_lupavul_daxumunavamureg.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/hhjhRgi/piggly_wiggly_store_hours.pdfIn PDF document text
    • https://tesafugefiwa.weebly.com/uploads/1/3/5/3/135318727/lukatowusa-disigaxulun-ferivalalosawa-xexunozibunu.pdfIn PDF document text
    • https://latimemoniborij.weebly.com/uploads/1/3/1/4/131437487/digozosu_fajurelezomawar_dojazodin.pdfIn PDF document text
    • https://cdn.sqhk.co/bexutavukaro/xjioihh/block_string_fighting_games.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/W5hfuie/paradise_island_bahamas_weather_forecast.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/fbahem3/craigslist_maine_cars.pdfIn PDF document text
    • https://cdn.sqhk.co/mabuviko/HFhahjH/kung_fu_panda_3_netflix_country.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/mavixu/48967918749.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/fedupesaxoniga.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/lilipebanedu.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/information_about_st._cathedral_church_goa.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/2296073830.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/9909573487.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_off0000dcc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC3 5644 bytes
SHA-256: c2435c8d215dc3e64f58e272d9a247828fcbf374f35dc8986c87e99cf741c093
font_01_sfnt_off0000efd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD9 9580 bytes
SHA-256: 69c6794901fabdac47487fe528e44b51771e37e071befcee75ec6a08999a1611

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