Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e52e1452788b0d8…

MALICIOUS

PDF

81.6 KB Created: 2021-03-08 12:08:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 92b1a05f39e2bf3bf49cc94cc4553531 SHA-1: b6c803a5c31a40ff1e956055e7adc4b55c33d508 SHA-256: 9e52e1452788b0d80c8b9282b6d9c21f3ea6c0a7d522fc3ce7272ed4b84f4331
126 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. One prominent URL, 'https://jumiwimov.ru/strik?utm_term=singer+ingenuity+7436+price', suggests a lure related to product pricing. The PDF structure and the presence of many external links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=singer+ingenuity+7436+price PDF link annotation
    • http://zagozogenef.sportsontheweb.net/82365363691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_60113b0b69b22.pdfIn PDF document text
    • http://organicsss.space/logodozkxfz2.pdfIn PDF document text
    • http://cashbackmoney.info/laxezedia1x3e.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/viva_el_toro_book_chapter_1.pdfIn PDF document text
    • http://gouliwer.online/magic_powers_superpower_wikiqk2u0.pdfIn PDF document text
    • http://euroshopmn.space/marvin_gaye_greatest_hits_vinyl6usqp.pdfIn PDF document text
    • http://jirusulixozome.scienceontheweb.net/how_to_solve_a_rubix_cube_step_by_step_algorithms.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/does_the_watchmen_movie_follow_the_comics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488572/normal_5fc593e8b53df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_601f9a8c5e77f.pdfIn PDF document text
    • http://bestsalestoday.xyz/mosugigoa0ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449193/normal_5fd7d8515e12b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490929/normal_5ffc969f4e203.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2017cad3-2b6a-42b1-aed7-bc0bf76c34e0/6706866399.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/46435424309.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df39c623-c750-4d48-b233-fbcd481f7dfd/how_does_culture_affect_entrepreneurship.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/47344735124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a968e97-048e-479a-99fa-d189be42d410/buganozejusanudi.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/giratina_altered_forme_raid_guide_trio.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/salesforce_lightning_design_system_developer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/ramiwugavoxiwudekiferiru.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_off0000f355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF355 5144 bytes
SHA-256: 3da7aceb23b52f69427817f1fe223e8a0d1b03b3dbeadf76d45b87c7f9014b9b
font_01_sfnt_off000104fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FD 11276 bytes
SHA-256: 0d664746bfcec82705fd0e8eab865882c22234dbea16952171b0df7f90a83236
font_02_sfnt_off00012aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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