Malicious PDF — malware analysis report

Static analysis result for SHA-256 f483c5c48f81f004…

MALICIOUS

PDF

107.7 KB Created: 2021-04-12 14:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2844581aa7f41759d3f2898d1708549c SHA-1: 0e97ec0da1433870aacbc7c7966c8cd9b38f0417 SHA-256: f483c5c48f81f004b4970790dbb5c41572097626ae3cf505cd21f65e5fc841ea
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm with external URIs pointing to suspicious domains, specifically 'botokaw.ru' and 'basidugom.mygamesonline.org'. The document body, though heavily obfuscated, contains text fragments that may relate to the lure. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/strik?utm_term=experience+human+development PDF link annotation
    • http://basidugom.mygamesonline.org/41856217107.pdfIn PDF document text
    • http://kukufimivote.iblogger.org/plantronics_voyager_edge_bluetooth_driver_windows_7.pdfIn PDF document text
    • http://boost-shop.xyz/735737131842ra3p.pdfIn PDF document text
    • http://fullpisetc.ru/44409581194ozulb.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/checkpoint_5800_installation_guidefu6xr.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/blob_to_image_javascript.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a6cf91-792c-4135-b323-a3eadab06636/tintin_books_ranked.pdfIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/vonotitoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9da7311-79b9-4c06-b8f9-031239d81b85/finding_derivative_with_fundamental_theorem_of_calculus_chain_rule_calculator.pdfIn PDF document text
    • http://xuvanemesu.rf.gd/where_is_the_thermal_fuse_located_on_a_whirlpool_cabrio_dryer.pdfIn PDF document text
    • http://nanaxidimidi.atwebpages.com/wbuttepa_b._ed_question_paper_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/691049dc-4160-4ad8-8e23-99eb2031d0ea/les_miserables_musical_plot_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a9c359-d09d-4b35-9fcb-1f9b0201c322/coleman_5000_generator_will_not_start.pdfIn PDF document text
    • http://matogojetize.rf.gd/dosowul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22761973-88e7-4e22-a748-a8f40ca34517/suwidanitagabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c55ba12-036b-4763-b650-8f8f69615265/68752375398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ebc9e16-eab8-4e76-bb65-27b32d1665bc/44592139268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3de6167-8c27-4557-b1c6-0ed73d9ea332/65781182311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/408722de-b060-417f-be20-b59f8cf087a1/caltrans_bridge_design_aids_estimating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1587bc20-6bce-4d96-adf7-40abbf74b078/muwejeboluwet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c33e6b-01dc-446f-98ab-7b64efe9b8d5/keurig_2.0_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16330a37-f24d-4089-8351-d2227ac91310/world_mythology_roy_willis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05fce5fb-c67d-43cf-92d2-0982670724ae/make_a_venn_diagram_to_compare_and_contrast_prokaryotic_and_eukaryotic_cells.pdfIn PDF document text
    • http://dilutibu.onlinewebshop.net/azilsartan_vs_telmisartan.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_off00016818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16818 5220 bytes
SHA-256: ae1a54c61214ee6fbad11ee57a40138537acb6359e28bc34f7bd034de83c17b4
font_01_sfnt_off000179b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179B7 11236 bytes
SHA-256: 1ca2f1d1c6aef0ebf81b2610dada275616110ab59f18934d205317511547dc12