Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfc3b3b9ec6cace…

MALICIOUS

PDF

87.0 KB Created: 2021-02-21 18:49:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2b3e9e10b301dda21ad07f4afb95b27d SHA-1: 9abc87a9ae6c25dc426314aa088f1c4f38486791 SHA-256: 2dfc3b3b9ec6cace2275e774fbe6198e3ca2e3723fede8ba6fbba1081852f6b5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=financial+ratio+analysis+project+report+pdf PDF link annotation
    • https://cdn.sqhk.co/xibumediw/RS8oaIK/45605340785.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/jhbifgj/music_video_maker_app_download_kaise_kare.pdfIn PDF document text
    • https://pexigupor.weebly.com/uploads/1/3/4/9/134901766/woxozaxisusapiw.pdfIn PDF document text
    • https://vevuduwas.weebly.com/uploads/1/3/0/7/130775740/xazanata.pdfIn PDF document text
    • https://tawedituja.weebly.com/uploads/1/3/4/8/134864040/d36c99b975f711.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/ggcjgjj/japanese_translator_jobs_salary_uk.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/lg_fridge_freezer_user_manualyjum0.pdfIn PDF document text
    • https://gizetaxawu.weebly.com/uploads/1/3/1/8/131871526/lolasoxuz.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/bogeguva/formal_resignation_letter_sample_short_notice.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/dedubibile.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/wuzokenalifavejinanuwow.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/what_are_stylistic_features_in_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/monster_hunter_switch_axe_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/a_level_biology_revision_guide_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/alvar_songs_free_starmusiq.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_off00011622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11622 5284 bytes
SHA-256: bcbbde2e3bf3c9c0d237d8b2a3f46201299dbf842f20fcc6d4ea3e67fcb289d6
font_01_sfnt_off00012839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12839 11316 bytes
SHA-256: 67b0daa2899edbbd7e9e962cfe212e6e4677c4b72cd9b60c22713ba30af540ea

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