Malicious PDF — malware analysis report

Static analysis result for SHA-256 317b215c85e9f1f3…

MALICIOUS

PDF

77.8 KB Created: 2021-04-10 22:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cf6d20d7efd5fb7ab6485252cf9dd9eb SHA-1: 26ac9ce32f0a5bd93cd8acf2ed8ef9622f72aef3 SHA-256: 317b215c85e9f1f33098b40540a27cddc5ef88e7b3d6f54ec72d795147839203
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, suggests a lure related to 'The sign of the beaver summary chapter 1'. No scripts were extracted, but the presence of many external URIs strongly suggests the document's purpose is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=the+sign+of+the+beaver+summary+chapter+1 PDF link annotation
    • http://japamawosoj.mygamesonline.org/equipment_sales_contract.pdfIn PDF document text
    • http://zukoretevir.medianewsonline.com/95187094017.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/hgNJvQ3/extra_long_acrylic_press_on_nails.pdfIn PDF document text
    • https://cdn.sqhk.co/dasewugiru/iYi7Se6/fallout_4_explosive_minigun_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/gjHghhh/descargar_actc_racing_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/ghbhjhc/folodivadunawafezig.pdfIn PDF document text
    • http://pobunav.sportsontheweb.net/91863841242.pdfIn PDF document text
    • http://sadipize.scienceontheweb.net/mathematical_induction_trigonometry.pdfIn PDF document text
    • https://cdn.sqhk.co/bepifopid/jKtidjd/sea_land_air_travel_paw_paw.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/2W9HT07/facebook_deal_of_the_day_bakers.pdfIn PDF document text
    • https://cdn.sqhk.co/bosavoked/gdtqhf7/vmware_horizon_client_download_5._4._2.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/why_does_my_ukulele_strumming_sound_bad.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
    • http://wiwosotu.myartsonline.com/l_encyclopdie_de_la_couture.pdfIn PDF document text
    • http://felubumasosazi.epizy.com/aarakshan_movie_worldfree4u.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/mushtaq_biochemistry_vol_1.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/how_to_critique_a_poem_using_critical_approach.pdfIn PDF document text
    • http://xelipiwaf.epizy.com/79648908478.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/xuleribufa.pdfIn PDF document text
    • http://gavofime.atwebpages.com/bnsf_schedule_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/dakenebagewebasux.pdfIn PDF document text
    • http://zedowep.atwebpages.com/25580106931.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_off0000e4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E5 5584 bytes
SHA-256: cf9deb1231b192408a2fa07c3d751d915a78bf653f364683e8581a874282c686
font_01_sfnt_off0000f7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C3 10476 bytes
SHA-256: 716cda83584fffb5d8145ded503807581341e7e42d3041679b44982ab708306b
font_02_sfnt_off00011bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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