Malicious PDF — malware analysis report

Static analysis result for SHA-256 f017d19956417981…

MALICIOUS

PDF

81.4 KB Created: 2021-04-06 18:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6b55f35facd13b84797048c938f494c6 SHA-1: 5275024d43914cfb2394d5fe8984bd53d84eae0f SHA-256: f017d199564179813092a1b5c48408b7b4cb880ed1b6d82bccef23fc023c506d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=science+of+mind+textbook PDF link annotation
    • http://mugukix.mygamesonline.org/mantenimiento_preventivo_de_calderas_industriales.pdfIn PDF document text
    • http://giwewigipebi.medianewsonline.com/mcdougal_littell_modern_world_history_patterns_of_interaction_teachers_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b8fea373-f6e3-4ce7-8e69-1da9beeb7ba7/craftsman_pro_series_20_inch_chainsaw_chain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7547b4e1-fead-48c2-8784-7221b36c8ba5/58066901080.pdfIn PDF document text
    • http://susixegan.rf.gd/best_quotes_from_the_speed_of_trust.pdfIn PDF document text
    • http://sekokap.rf.gd/thermador_repair_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff6ca92d-473e-4d09-940d-54b0e9716429/89623511562.pdfIn PDF document text
    • http://nejegidijikoj.epizy.com/dell_optiplex_3010_lan_drivers_windows_7_32_bit.pdfIn PDF document text
    • http://tosaxope.rf.gd/tejilerux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c76e773-50e5-4ecb-bd4d-4dfec10b2531/mazudofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6aef00-5f7b-47ad-98cb-d6c9b40a63f7/lepotopezorelezelajuku.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/why_does_apple_keyboard_stop_working_on_ipad.pdfIn PDF document text
    • http://vininotubosom.epizy.com/zalo_cho_pc_win_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6044836-832d-4bfb-9119-7c774fb42d56/charter_remote_control_codes_panasonic_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/canal_street_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25edb8b7-d631-42f2-aa97-3e2c687753d3/35559732256.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/what_is_tragedy_of_the_commons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd4bcb3-c439-49a9-ac36-dd43883949b6/what_are_the_4_types_of_ecosystem_monitoring.pdfIn PDF document text
    • http://fujifumava.epizy.com/80675323666.pdfIn PDF document text
    • http://tefixifurelo.epizy.com/dofulogufatimukexe.pdfIn PDF document text
    • http://kofukobekageja.epizy.com/87139919085.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/lake_placid_2_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/robujiledu.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/jupiter_absolute_return_fund_factsheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF456 4812 bytes
SHA-256: 5d2f666edc7d58de3a8b83e7f458f46cd1ee0f380f14c008773cd1d64ec1a9e0
font_01_sfnt_off0001049c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 11024 bytes
SHA-256: c5bd2efc596081af868d9fb44c22fabb067c4e8717268195e4b659bb9e1b98af
font_02_sfnt_off00012a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e