Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca338cf418f9a3e9…

MALICIOUS

PDF

81.4 KB Created: 2021-03-18 20:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f5c4f18ae796c4cff7297c4ab84fb654 SHA-1: 5115856bb1d9cf7591b23b459ac59b694ee2ebb4 SHA-256: ca338cf418f9a3e92f5cf49bc4f8bd641bf1e0677af4ad4b8dab8eddfd2d133f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://soxebez.ru/strik?utm_term=super+mario+sunshine+blue+coins+map PDF link annotation
    • http://lalat.space/counting_worksheets_for_2nd_gradeta6kx.pdfIn PDF document text
    • http://ru-dev.xyz/toro_string_trimmer_manualxpq26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_6026a6822fbdb.pdfIn PDF document text
    • http://xumegexujarev.22web.org/how_to_graph_probability_distribution_in_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/watexoba/j0OqifT/6245583135.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/heX7mjb/impossible_game_answers_19.pdfIn PDF document text
    • http://hr-insider.com/bodyguard_telugu_movie_ringtones_free0iun2.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/YhcKtr5/gmod_gamemodes_download.pdfIn PDF document text
    • http://pepipejevu.iblogger.org/aceite_de_coco_fraccionado_doterra.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418747/normal_604b53a3d6398.pdfIn PDF document text
    • http://storergoods.site/panasonic_kx_tga410_manualb62cr.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/jfgfhjL/smart_tv_sunrise_ch_channels.pdfIn PDF document text
    • http://liketime.online/2887482059298zcc.pdfIn PDF document text
    • http://wavikedinufefe.iblogger.org/chiari_ii_malformation_definition.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1633aea7-fb94-47f6-ae52-dc445fe1c650/17880042947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9024c7c3-4763-441d-875d-500ad31448ca/panasonic_kx-tg7875s_cordless_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c48cf08-f785-43de-bfd7-eea674120e45/9850210734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1850b569-0e31-4d72-adbe-b66fb8313e89/fire_and_ice_by_robert_frost_interpretation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e5f273d-d1ba-48e1-a093-550782f363e5/how_to_make_a_historical_fiction_story.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_off0000f5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F4 1556 bytes
SHA-256: c112c5de11af5fc223dd35717672de6ae11cada894c75d60d4fb04cd8309fd47
font_01_sfnt_off0000fddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDC 5416 bytes
SHA-256: 9d71999f8029aa021de39a3981a61e40e2600169613fe88eecc259eb01fc7af1
font_02_sfnt_off00011011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11011 11656 bytes
SHA-256: e5c0950105828beff158c2388e0cc36b10a0628ee86c1c4907d3693ecc3b7a52

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