Malicious PDF — malware analysis report

Static analysis result for SHA-256 713dbbf203d5039b…

MALICIOUS

PDF

83.9 KB Created: 2021-03-01 17:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e7395aba89bb0b4f2d08495dd66de575 SHA-1: 9b204bf0e7103469b587f0a7edf390b1ac094dcd SHA-256: 713dbbf203d5039b75f7890a66c5ee0b44005627385f980516cc68ff017e50e6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect the user to a malicious site.

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://baarspo.ru/award?keyword=tigerclaw%2527s+fury+allegiances PDF link annotation
    • http://tosefabebiribow.scienceontheweb.net/wagakoluvokipexig.pdfIn PDF document text
    • https://tekaxudifen.weebly.com/uploads/1/3/5/9/135992886/rutopevumiruboj.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/idjh3as/xinaliperejumaxizo.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/bMhjheG/out_of_the_loop_game_freaks.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/99838447457.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/hchfb1O/classroom_management_techniques_secondary_school.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/67445618472.pdfIn PDF document text
    • https://rofofomigedug.weebly.com/uploads/1/3/4/4/134486696/b4189798947.pdfIn PDF document text
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/mevev.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/34650323086.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/age_of_exploration_vocabulary_worksheet_answers.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/44397680972.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/cpMn3ic/giwefiwufed.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/87562677684.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/graphic_designer_jobs_nyc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pivimufe.atwebpages.com/cool_white_outdoor_christmas_lights_battery_operated.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/rilunubopobasawodomeduf.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/rizujoto.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/xunadikugasejebimoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/19335242658.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/wow_classic_horde_fishing_leveling_guide.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_off000101ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EF 2984 bytes
SHA-256: 8f6b66f2d3c9ca996ff87e40f33597e9c5c74b8385f5a1716ed9de3537cee889
font_01_sfnt_off00010c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9F 5228 bytes
SHA-256: 8650e82b73ffaa3b7b81fcf68d23bd1b4f59d37cf66173121c972e0901d1e17e
font_02_sfnt_off00011e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9B 10212 bytes
SHA-256: bee9b2d36163e5c3eb8107137022a32531c6b3a1dcb05f6f4857cd16458586db

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