Malicious PDF — malware analysis report

Static analysis result for SHA-256 1198ae0d3355be08…

MALICIOUS

PDF

74.1 KB Created: 2021-03-04 06:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5877bde8cf90a434629d28d3c9862d4a SHA-1: 53c2b4d3d674c715b035a1b5fea97e04c1836098 SHA-256: 1198ae0d3355be08bde2d39167eba288e1da69b4ef0784c3592e54b1d40b9d2c
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 0.9998

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://resalured.ru/123?utm_term=gopro+hero+3+black+default+password PDF link annotation
    • https://cdn.sqhk.co/mekurapiw/Kngc4gh/black_ops_cold_war_trailer_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/b1Kheqr/dare_you_go.pdfIn PDF document text
    • http://rixugogalide.22web.org/sojadilugogixalop.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/oster_clipper_customer_service.pdfIn PDF document text
    • http://popularchoice.space/flight_1549_air_traffic_controlleroyllx.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/GiYbngd/30403357763.pdfIn PDF document text
    • http://xevanaz.iblogger.org/tebakedigovadivuvabip.pdfIn PDF document text
    • https://cdn.sqhk.co/kuniremolu/Kihifjc/super_mario_world_secrets_vanilla_dome_2.pdfIn PDF document text
    • https://cdn.sqhk.co/xeveweno/eGxu3tO/wonowipowufixeb.pdfIn PDF document text
    • https://cdn.sqhk.co/refevebux/fugin2W/rotuxajunamoj.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/21840707024.pdfIn PDF document text
    • https://cdn.sqhk.co/fixefalid/dg1nL1x/67812245894.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/guardian_wireless_pet_fence_battery.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/jidosatikim/volajazizur.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/82468537128.pdfIn PDF document text
    • http://palelezugob.onlinewebshop.net/6.1_practice_a_geometry_answers.pdfIn PDF document text
    • http://dagoroj.rf.gd/android_tv_box_apps_for_free_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/free_folder_icons_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/how_to_say_lemon_meringue_in_spanish.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_off0000e30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 5732 bytes
SHA-256: e47784848e72c87dd6881e93b1f4f98ed62318a1995dd2ef4757963a0a7f6ddb
font_01_sfnt_off0000f695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF695 10552 bytes
SHA-256: 14925c83e1688725c37ce607b1898c2185a559a4905b4223dd37607dad894306

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