Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e469d508dd3d1e…

MALICIOUS

PDF

97.6 KB Created: 2021-04-01 12:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3ae31f9109b61f4eddc42df57922a37b SHA-1: 2b09255fed22db8eb7870e0d4ca8e931afd5db83 SHA-256: 13e469d508dd3d1e74273bcfb9f4178fb3954c01b51e234f197805b81133a433
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 0.9996

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://jumiwimov.ru/wix?keyword=game+of+war+troops+guide PDF link annotation
    • http://lianhua.life/misal_romano_diario_mexicos2muh.pdfIn PDF document text
    • http://infokurs.design/what_s_your_story_in_one_line_fiverrf2rfw.pdfIn PDF document text
    • http://smcjd.com/academy_xperts_mikrotiktgrns.pdfIn PDF document text
    • http://goproonly.com/vamos_a_cazar_un_oso6j1z2.pdfIn PDF document text
    • http://aov.one/22873984133iw761.pdfIn PDF document text
    • http://kellys.space/47010246656d0w4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zoxumatodemake.rf.gd/aerospace_engineering_course.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/exploits_of_a_young_don_juan_movie_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5cfd7ce-b832-486d-991d-fecf0661b815/technical_drawing_app_android_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bbb3858-ba97-4cc2-8ef5-23da2dafe0bd/who_is_the_most_powerful_goddess.pdfIn PDF document text
    • http://ravefitupuzam.epizy.com/21030330575.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/84057289524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341c90e2-77f3-442f-aa86-30b4a2fc5efa/95946664506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7bd7cda-3e35-4591-9c67-22265ce7971d/honeywell_quietset_fan_turns_off_by_itself.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/bekhayali_song_whatsapp_status_pagalworld.pdfIn PDF document text
    • http://femadovasawexas.epizy.com/agriculture_careers_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/boss_ve_20_vs_tc_helicon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8bc79e-a074-4e5d-872b-7d634212cb55/gevatorejuzorepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2333319b-89f9-42b9-ae0c-954c91df7cd9/bash_scripting_tutorial.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12252 5452 bytes
SHA-256: 649dfc83073040c1f99a8b92e747e4261206f1a7abe09abaa6f7006de5ecc74b
font_01_sfnt_off000134d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D8 1796 bytes
SHA-256: dfab3945eace5ba27be1ad95d63d5142397767eab6bca27773794b33bda2302c
font_02_sfnt_off00013d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D62 10924 bytes
SHA-256: 452a2bef31b89426773f07ee31c24a299d53c09924c318b334a836b64dd59aa7
font_03_sfnt_off000162fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162FE 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b