Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c2d6edd8e3b66b…

MALICIOUS

PDF

77.1 KB Created: 2021-03-25 16:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 018b92c0abecc1344264cb1b5e82366d SHA-1: d1b33d92c0e037905bad068eec8ac3100c69795b SHA-256: c3c2d6edd8e3b66b454c3bc65e756936666bc491c8d6ba9158f5984ace025cc5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or SEO spamming tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=easy+piano+songs+sheet+music+pdf
    • http://hookup154.fun/fantastic_mr_fox_book_number_of_pagesdmy43.pdf
    • https://cdn.sqhk.co/wevexifimur/ijhh6hi/x-_plane_nvidia_control_panel_settings.pdf
    • http://gratoraama.website/rugby_league_2019_mod_apk2g24t.pdf
    • https://jibarekoruw.weebly.com/uploads/1/3/4/4/134445620/2347292.pdf
    • http://support-copyrighthelpservice-about.com/45156831513s61zd.pdf
    • https://cdn.sqhk.co/dedogupazib/jjisifH/69466644110.pdf
    • http://pogadai.xyz/free_tableau_training_for_veteransocavc.pdf
    • https://cdn.sqhk.co/kewebogi/gjxTwhd/lockwood_mortice_lock_template.pdf
    • https://cdn.sqhk.co/datujisukebe/iiMjiih/21189426128.pdf
    • http://promoocaoameericanas.com/a2mbpro_amortiguadores_in_englishevvfa.pdf
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/magetu_tuliv_zomitufaxogejek.pdf
    • http://getchambre.xyz/how_to_correct_slew_foot1fyv2.pdf
    • https://cdn.sqhk.co/wepunajexiju/jeijhgw/lecture_notes_apk_free_download.pdf
    • http://b4shop.icu/canon_pixma_mx922_ink_cost6iyy7.pdf
    • https://pepizowa.weebly.com/uploads/1/3/2/7/132711999/narib_noxewijima.pdf
    • http://watercart.ru/396638419387z1yg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sedowedi/78844165548.pdf
    • https://s3.amazonaws.com/bidemewufa/consumer_reports_mattresses_toppers.pdf
    • https://s3.amazonaws.com/xuzed/cheap_eyelash_extensions_classes_near_me.pdf
    • https://s3.amazonaws.com/povodijirig/30954676044.pdf
    • https://s3.amazonaws.com/rokuwapesu/certificate_of_insurance_acord_form.pdf
    • https://s3.amazonaws.com/levovod/counterclaim_template_india.pdf
    • https://s3.amazonaws.com/levumoduf/motorcycle_in_gear_but_wont_move.pdf
    • https://s3.amazonaws.com/sitok/zunin.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef3b.bin
e5b409f5f90edac40658a7203d6dfb73bffbc208ff5ee29fa433c3f7ff7ee434		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3B 5500 bytes
font_01_sfnt_off000101dc.bin
8f3ec7e1d249b1b863c9d064e7b2c8ec6eefabb5d84060d7ec5e2e7e398e65ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 10788 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.