Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ffc311fb86dbb2…

MALICIOUS

PDF

77.6 KB Created: 2021-03-27 17:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3b1ef75df1045a2141008febedae3e7b SHA-1: 27cadf4b9a294e6d9c7dd8e8b0c456d834dbe3e5 SHA-256: 36ffc311fb86dbb25efa8db25dad4c792b267917116f5fc77809f69870a0fc3c
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to distribute or phish via these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=pursuit+of+god+with+reflection+%2526+study+questions PDF link annotation
    • https://cdn.sqhk.co/jugemito/wHyYge3/ramenoxezo.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/XtNhjgc/blue_ice_fire_wolf_wallpaper_download.pdfIn PDF document text
    • https://werirubiteda.weebly.com/uploads/1/3/5/9/135972418/sakatiw.pdfIn PDF document text
    • https://cdn.sqhk.co/rigidaluta/eKI8jgb/ping_pong_the_animation_op_full.pdfIn PDF document text
    • http://stav-games.ru/muvawibexelorbcsg2.pdfIn PDF document text
    • http://ketrovk.xyz/income_statement_and_balance_sheet_template_excelj7fnz.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/ieic4hf/ludovico_einaudi_divenire_album.pdfIn PDF document text
    • http://antileqphh.site/waxewegifgfgdd.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/Dhejfd8/true_football_manager_3_patch.pdfIn PDF document text
    • http://mon-cmb.best/glock_26_gen_4_trigger_pull_weight6il8u.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/ic7jbib/color_me_amazed_meaning.pdfIn PDF document text
    • https://vemugalibi.weebly.com/uploads/1/3/4/4/134484787/vowufiji_jasinokomir_suzupetoruloka.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/7hfkmhh/nickelodeon_kart_racers_2.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunagakiz/axBWGxR/kukogajogejipinekazu.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/Rjchc8f/vawivufevixaduwuwafawig.pdfIn PDF document text
    • http://leqqurint.online/122374046496e183.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/giumnhd/73535245255.pdfIn PDF document text
    • https://xomunulozesini.weebly.com/uploads/1/3/4/0/134018183/sagixa_zajabovunek_susidafefoxozur_romelero.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/zpghbji/hello_zombie_apk_download_for_android.pdfIn PDF document text
    • https://limowofexi.weebly.com/uploads/1/3/4/2/134235517/lapavem.pdfIn PDF document text
    • https://cdn.sqhk.co/lukejisuvawe/BKhajaC/fadiwotube.pdfIn PDF document text
    • https://gebogunuwol.weebly.com/uploads/1/3/4/7/134732963/6127784.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugewameru/YUs7vhh/jeopardy_playshow_microphone_not_working.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/pegozegi/google_sheets_sumifs.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/fios-g1100_latest_firmware.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_off0000f271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 5164 bytes
SHA-256: ef6c85ace7cb2cd5599b942c4d5f2a4148bccf14f55106ec238302818bf04660
font_01_sfnt_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 10812 bytes
SHA-256: eb1af101fda041ff1172b5579777d75ce0e93656021ae4a453d434d41ac6ac91