Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6c0cdd2eeda283…

MALICIOUS

PDF

76.6 KB Created: 2021-02-23 23:44:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 71c1c09c35b08874d3287cfe4f8ad0a3 SHA-1: e296fb2d6178134eb8b909b7ab46926d5656c6cf SHA-256: 2d6c0cdd2eeda283b184b2b8adbc85e891767350ff67d55f490b2b0900b0d1fc
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of embedded URLs, many pointing to disposable hosting and employing UTM parameters, suggesting a link farm or phishing lure. The presence of these numerous external links indicates an attempt to redirect the user to potentially harmful websites.

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 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://leonvi.ru/123?utm_term=veg+dinner+for+weight+loss+indian PDF link annotation
    • https://kosodakugup.weebly.com/uploads/1/3/4/6/134655388/kuserutafumebizotid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448115/normal_5fe0ec291365a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426415/normal_5ff46e6fbe1be.pdfIn PDF document text
    • https://romagazep.weebly.com/uploads/1/3/4/7/134759296/logota_kiwibewapefu_fafebedujefo.pdfIn PDF document text
    • http://jaraxusej.iblogger.org/38892149857.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/gcJrjh5/host_learn_100_languages_free.pdfIn PDF document text
    • http://tarusexozof.iblogger.org/85033677413.pdfIn PDF document text
    • https://cdn.sqhk.co/wunasesev/qPJWhbP/ball_vs_brick_game.pdfIn PDF document text
    • https://vokavize.weebly.com/uploads/1/3/2/7/132710687/kijakalefolonik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462037/normal_5fe279fb2f93e.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/tigewibejageju/gutajimug.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/gawaleligute.pdfIn PDF document text
    • http://jexuzutipeku.epizy.com/kizudofumogoxatezi.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/57819933373.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_off0000ef42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 5224 bytes
SHA-256: 6934721e2d7dade3c62631bc4f1c16de46f1ddf8f6889d321ad542428efa68c0
font_01_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 10584 bytes
SHA-256: ff0d9066e24015c37c69602b7575d10f274fa1bf634c9bddeb6474020e93388a

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