Malicious PDF — malware analysis report

Static analysis result for SHA-256 2110eacc7c11a8d0…

MALICIOUS

PDF

73.9 KB Created: 2021-02-21 02:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4b71396bb7db753c676b2acd70cfb4a5 SHA-1: 6bce87fe918482314a9869f076aad500348c04c3 SHA-256: 2110eacc7c11a8d08c037126aaf6f593bfba6e458d18cc3bb0d92b04abeeafbe
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm, suggesting a phishing or scam attempt. The primary lure appears to be a fake download for the 'Attack on Titan' game, directing users to malicious sites.

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://jacksth.ru/wb?keyword=attack%20on%20titan%20game%20pc%20download%20offline PDF link annotation
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/605e5.pdfIn PDF document text
    • http://online-bestshop.xyz/39757318231dhlzq.pdfIn PDF document text
    • https://cdn.sqhk.co/dajuzafum/LKhgJgh/transparent_glass_screen_protector_iphone_8.pdfIn PDF document text
    • http://presalon.xyz/sql_join_different_data_types_performanceta5q5.pdfIn PDF document text
    • https://xonajababivoxo.weebly.com/uploads/1/3/4/0/134040492/ravuxu.pdfIn PDF document text
    • https://zepafasamog.weebly.com/uploads/1/3/4/3/134361306/mekum.pdfIn PDF document text
    • http://reduslim-italia.website/usanetwork_activate_nbc_fire_tvd5sdk.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/ciejg4N/2730047852.pdfIn PDF document text
    • http://copyrightshelpscenters.com/devilbiss_air_compressor_oil16qew.pdfIn PDF document text
    • https://fedonofawok.weebly.com/uploads/1/3/4/8/134881994/8239413.pdfIn PDF document text
    • http://steh-sistem.ru/cute_baby_girl_outfits_newborn5c896.pdfIn PDF document text
    • https://cdn.sqhk.co/mifopanikil/SXpOieP/powob.pdfIn PDF document text
    • https://cdn.sqhk.co/nagebagem/heTTjdC/99372423834.pdfIn PDF document text
    • https://zuranuwazob.weebly.com/uploads/1/3/5/3/135332575/3cd5dbaff.pdfIn PDF document text
    • http://instapresent.site/d365_management_reporter_exportes86m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/cd_dvd_labels_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/heart_broken_song.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_off0000e33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33A 5348 bytes
SHA-256: 1855361d46c5f5bffe54aed160bd073ec5aafbf6f864ed8d8ec6b9f24d81c5ad
font_01_sfnt_off0000f576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 10812 bytes
SHA-256: 5a67a3dff92c6c1970b18a5f7a19e282725bc5a6f8e051a10bbb18ae1f797978

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