Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad58471bd9d5de4…

MALICIOUS

PDF

68.5 KB Created: 2021-03-29 01:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 193c8345cdd794d09b97ad5d61076bcc SHA-1: bf9ed7be42f8139db43dd064af6d96b793d611fb SHA-256: dad58471bd9d5de43c5a6b8e828334f927acef517175a4d378a394985f68a3cd
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=east+picacho+elementary+staff PDF link annotation
    • https://cdn.sqhk.co/pesamelez/sqjhihr/rulazesusegiruwena.pdfIn PDF document text
    • http://lerawutevokaj.iblogger.org/arcane_duelist_pathfinder_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/jhe9PYY/dugakikagikoxa.pdfIn PDF document text
    • http://love-your-lips.online/best_last_jedi_quotesnpzaf.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/OOjjigM/cruise_critic_princess_drink_prices_2019.pdfIn PDF document text
    • http://sait-ok.ru/nivebulij2l3f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xusevig.epizy.com/marxisme_capital_travail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57366855-6339-479b-8d4b-a574e081bcf7/find_the_best_online_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c020f94-de4d-418d-aeef-6bd8023cf569/how_to_restore_keyboard_function_keys.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/nalolexipoxekiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe7a697f-f321-40b1-af4d-2ac9cd2b6541/calligraphy_letters_for_beginners_with_pencil.pdfIn PDF document text
    • http://vebilotavofako.rf.gd/39146062743.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/ak_47_wale_song_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1298a580-3c6d-4bae-940e-6a5e28b59fef/pioneer_sph_da120_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dff3160-b4d4-4c02-b287-279567bfbab8/andrew_loomis_how_to_draw_the_head_and_hands.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_off0000cf48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF48 5316 bytes
SHA-256: d291f135dc3db8a90c182d22ffa255263795aa2ce6971c6723ff1eecd7a3d97e
font_01_sfnt_off0000e140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE140 10920 bytes
SHA-256: 1ff1686ec4c75ce794975907f4db57a44fad968bc7e6705683f209e5f39e65ae

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