Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d934b076011334…

MALICIOUS

PDF

84.0 KB Created: 2021-05-16 14:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 183c32682b6960bc520e9f9218e302a3 SHA-1: 33a9a28c415454714d87a0e0381cc6e14e51ddf0 SHA-256: d1d934b076011334f23b24c38b851be7bc3f7f6bb84bef96e8b1b32011273a51
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on low-reputation hosting. The document body, though heavily obfuscated, contains a URL that appears to be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://bologen.ru/strik?utm_term=best+nylon+strings+for+godin+multiac PDF link annotation
    • http://allostar.buzz/jetblue_airways_ipo_valuation_case_studynydja.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/716401171686pa3q.pdfIn PDF document text
    • https://cdn.sqhk.co/pifitudebuxo/DifXjdi/spina_bifida_symptoms_newborn.pdfIn PDF document text
    • http://avlto.best/cannot_uninstall_architect3fagp.pdfIn PDF document text
    • https://cdn.sqhk.co/jasojime/B3wgjge/75415895306.pdfIn PDF document text
    • http://docita.fun/6454271866316nyo.pdfIn PDF document text
    • http://vertigoa.online/business_data_communications_and_networking_13th_edition_quizletdi0qu.pdfIn PDF document text
    • http://ledimpress.biz/667202048639ad1s.pdfIn PDF document text
    • http://creditscorecard.info/critical_hit_deck_pathfinder07n4v.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/fRX6uhi/pokemon_wallpaper_hd_iphone_5s.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzewekafan/hfI6KKD/t-_mobile_near_me_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/lasumalena/p4iuZej/happy_birthday_jesus_sheet_cake.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/fLhfhbH/47098555439.pdfIn PDF document text
    • https://cdn.sqhk.co/momebuman/lt44KVY/royal_canin_boxer_puppy_food_feeding_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/puruwedisuma/eoKEFig/free_slots_to_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/falugojafat/jdThfBN/at_t_voicemail_viewer_app_for_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://novezepif.rf.gd/jspdf_autotable_example_jsfiddle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb927393-974a-469a-b7c3-808f4ac9ef85/rosuj.pdfIn PDF document text
    • http://wofodumav.rf.gd/kofosidanuwuva.pdfIn PDF document text
    • http://webubekesivamuf.epizy.com/extrapolate_data_google_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86715090-1466-44d7-8720-af9e13c5d314/53264624777.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_off00010a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2D 5492 bytes
SHA-256: 52ca6a036d0a130eaaebca7d1f24fc044537ac7c270c1ee0af38bbd5f5e552fa
font_01_sfnt_off00011cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD0 10532 bytes
SHA-256: d88895f691922a7eac32ca42ac139ca68146f473487eaf117911f64e56800d21

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