Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a1a442cb31569f…

MALICIOUS

PDF

70.0 KB Created: 2021-02-08 04:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 570a214054959b4b7cca032608ecde05 SHA-1: 788053effd71e3323d73e20202bf112c673ff81a SHA-256: 27a1a442cb31569fb18e5120cc317e12cdcfbf9e9764222d404c422ee209d00f
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://jacksth.ru/wb?keyword=cuboid%20net%20template%20printable PDF link annotation
    • https://durabikat.weebly.com/uploads/1/3/4/5/134512276/kudotesizezex.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/jb4sige/fuwaruzaguzupije.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/h11KX0p/flashlight_off_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/fyCOieK/air_fighter_1945_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lexewagoz/iahahce/class_9th_maths_ncert_solutions_chapter_13._7.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/ibhcNhg/free_music_ringtones_iphone_8.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/TfOpJhl/mobile_emergency_call_number.pdfIn PDF document text
    • https://muvanuxeb.weebly.com/uploads/1/3/4/0/134096654/zubezowog_nagomij_gutodexaza.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/idihRif/animal_sacrifices_in_the_bible_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/dihjjjg/best_wedding_cake_design.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/dagasopones/7728482297.pdfIn PDF document text
    • http://wubogijogazerew.epizy.com/reporter_live_video_gana.pdfIn PDF document text
    • http://wowemipawugese.epizy.com/fantastic_frontier_dungeon_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/kumasigilikidaje.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/jobegawozerofof.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_off0000d5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E5 4972 bytes
SHA-256: 90724d88b5e3d3c4e914d011ee3433168d657cd8056c905aba8b2ea33b02a94b
font_01_sfnt_off0000e6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A3 10648 bytes
SHA-256: 3f96d8019dae37422064eb929484bb01b399ea5e6e02142eb450f34f029a973a