Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aaa31996c4fef7c…

MALICIOUS

PDF

74.4 KB Created: 2021-02-23 01:22:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 160e6ed08930034ac81a09ac43d02e99 SHA-1: 7013b0a44a16ccec680374e72910eacf52035859 SHA-256: 7aaa31996c4fef7c89986e43080ad4eb42f57a321d4c34c1a2c838acd36f4eca
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://seumenha.ru/123?utm_term=who+proposed+classical+conditioning+theory PDF link annotation
    • http://legko.travel/wexirodasemexenusilqgn9.pdfIn PDF document text
    • https://feveronibamuja.weebly.com/uploads/1/3/5/3/135300243/3495235.pdfIn PDF document text
    • http://meetdouche.xyz/7372959989893fai.pdfIn PDF document text
    • http://fly-drive.online/projet_de_loi_de_finances_2020_maroc0eesh.pdfIn PDF document text
    • http://tophomework.space/dapagjf52j.pdfIn PDF document text
    • https://cdn.sqhk.co/wenejusuzixe/MhexjgH/jugemekowu.pdfIn PDF document text
    • http://winclean-shop.space/armstrong_cable_channel_guidehrpza.pdfIn PDF document text
    • http://latencfsrt.space/372751418454a3id.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/petikamov/98430281281.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/plain_black_wallpaper_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/jotesibepalixu.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/chamaram_malayalam_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/sozomemimozojegulu.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/biosecurity_act_1993.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/happy_birthday_papa_ji_song_pagalworld.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_off0000e73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73F 5452 bytes
SHA-256: 6fbe842ad8df1d7157fd45051994628fc2cef69eb66d2bb7ca78693d9cb2f5e4
font_01_sfnt_off0000f9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D5 10168 bytes
SHA-256: e44216ed929cca22960cb7cfadc02c275508f2a7f42ca9b9db67519e4a597702