Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29b919b6978704e…

MALICIOUS

PDF

83.6 KB Created: 2021-05-12 10:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4e59351dfac9edb8c88b43d769b591b5 SHA-1: 2967ed0249231f3046f84f4277c5a54024615938 SHA-256: e29b919b6978704ed6107641130cf4d3ac82ecae2ae86e967d735eae56f1c7b2
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to lure users to potentially harmful sites. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nipisod.ru/strik?utm_term=how+much+does+a+mercury+150+optimax+weight PDF link annotation
    • http://wadipogi.medianewsonline.com/vizitufewaxazar.pdfIn PDF document text
    • http://kerosijuvibeg.scienceontheweb.net/difference_between_business_intelligence_and_business_analytics.pdfIn PDF document text
    • http://kukukoboda.22web.org/atfal_usa_report.pdfIn PDF document text
    • http://godumos.22web.org/11190491847.pdfIn PDF document text
    • https://zuzoperelalame.weebly.com/uploads/1/3/2/6/132683259/3595346.pdfIn PDF document text
    • http://xejelofewi.mygamesonline.org/84719790202.pdfIn PDF document text
    • http://gezoxapawelu.22web.org/cyber_hunter_specs_requirements_android.pdfIn PDF document text
    • https://zazibarem.weebly.com/uploads/1/3/0/7/130775746/nelifexotid.pdfIn PDF document text
    • http://suvekitubexeso.getenjoyment.net/laliw.pdfIn PDF document text
    • http://puviwaxeraw.22web.org/84696753665.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rowujerofinofek.epizy.com/cinderella_story_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/vcds_12._12._1.pdfIn PDF document text
    • http://kasesapat.rf.gd/shimano_di2_junction_box_bar_end.pdfIn PDF document text
    • http://xazikipigenuvi.rf.gd/dale_earnhardt_winners_circle_diecast_cars_value.pdfIn PDF document text
    • http://jizowasogafiw.rf.gd/marketing_textbook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/prison_officer_maths_test_answers.pdfIn PDF document text
    • http://tuparibuju.atwebpages.com/data_structure_and_algorithmic_thinking_with_python_download.pdfIn PDF document text
    • http://kalilom.epizy.com/right_triangle_trigonometry_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/buoyancy_principle.pdfIn PDF document text
    • http://gijaguvid.rf.gd/64738017600.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/facebook_blueprint_practice_test_answers.pdfIn PDF document text
    • http://fuvituze.epizy.com/nintendo_ds_lego_batman_2_arkham_asylum_walkthrough.pdfIn PDF document text
    • http://nudenagazosizav.epizy.com/84734981441.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_off0001078c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078C 5996 bytes
SHA-256: cd5f1350168909d3b4eb84828b67fc249faf2ddc0087f59bb8fda2fd2885a24d
font_01_sfnt_off00011beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEB 10788 bytes
SHA-256: a08efeecda7e3fba76e5ceb1df6a71a1d9429846fbea1ef36c251344a23a71cf

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