Malicious PDF — malware analysis report

Static analysis result for SHA-256 70eb669150ee02de…

MALICIOUS

PDF

81.1 KB Created: 2021-03-20 10:32:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 1617537be85585dd4ebeca8374882191 SHA-1: 9f99a0bcef319cbaa09206bf64439c7fc24fce97 SHA-256: 70eb669150ee02de9d841b56f7e2383709cbe6535b61f8a3140246c8ba6c784e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated, but the presence of numerous external URIs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/wix?keyword=how+to+clean+bunn+coffee+maker+youtube PDF link annotation
    • http://nejoxulogawa.22web.org/aptitude_and_reasoning_questions_with_answers_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483071/normal_5fe8d7ef2e022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415081/normal_5fd6127c88374.pdfIn PDF document text
    • http://bajesiradevo.getenjoyment.net/fotavabajenonakujog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468294/normal_603f94bb7d3c6.pdfIn PDF document text
    • http://faponabon.mygamesonline.org/free_california_residential_lease_agreement_2020.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/the_hacker_playbook_3.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/which_idea_does_the_theme_of_thank_you_maam_deal_with.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_6045110b584c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501963/normal_601e41622f1b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413007/normal_5ff865cecfa07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498893/normal_6038c2bb9f489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_602d8c7bbbe90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418747/normal_60007908877d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457279/normal_60262d44a130b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_604354e895bc3.pdfIn PDF document text
    • http://lukukitufegaxib.22web.org/70849739767.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/sulasatevirexo/95032490282.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/characterization_worksheet_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/toefl_test_sample.pdfIn PDF document text
    • http://bekegukuvaliji.rf.gd/bible_study_lessons.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/volvo_xc90_service_history.pdfIn PDF document text
    • http://zumoriko.epizy.com/zafawenodafesewol.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_off0000ffc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC6 5208 bytes
SHA-256: deda888b53658f16cda04ad4db7073f6dbd585049d5d851422ca53fbc8495a73
font_01_sfnt_off00011187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11187 10884 bytes
SHA-256: 53c241609d4ca33f65c24ecca27a8559b54ce1b9096d9ddaf2ed5669af54720b

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