Malicious PDF — malware analysis report

Static analysis result for SHA-256 176530bea59e2ffd…

MALICIOUS

PDF

130.5 KB Created: 2021-02-20 22:23:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6ad978aa66710478c332fef39ec895ac SHA-1: eb25b8367617c5c1ca9e2da3e01675129502a83e SHA-256: 176530bea59e2ffded23959d55dde6f1c5863ef7dd91eeee981e9ec3d0044265
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure, disguised as a search result for a specific query. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the embedded URL is the primary indicator of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=how+much+does+foster+care+pay+in+texas In PDF document text
    • https://cdn.sqhk.co/fufigavaki/dC7OSBm/605280208.pdfIn PDF document text
    • https://cdn.sqhk.co/wedegetuso/fuGxicK/subway_surfers_hack_unlimited_coins_and_keys.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/aSJOIBl/babysitting_jobs_near_me_for_15_year_olds.pdfIn PDF document text
    • http://kersita.space/photo_collage_canvas_with_textlvg70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474759/normal_601f92faacaaa.pdfIn PDF document text
    • https://cdn.sqhk.co/luwonowuwig/hbhbgAe/addons_for_minecraft_1._16._40.pdfIn PDF document text
    • https://cdn.sqhk.co/rotuzuwibi/dPjghgX/bullet_manufacturers_in_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/Eojbfia/display_recorder_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vivejegefonu/DsRhgyj/amc_c24_plus_costo.pdfIn PDF document text
    • https://cdn.sqhk.co/wofamofupu/4uC1jjn/tap_defenders_mod_1._5._4.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/ruzaganog/28316805618.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/bibisebaz.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/78311751725.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/25235229429.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/sc_st_prevention_of_atrocities_act.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/22841078572.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_off0001bbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBF2 5588 bytes
SHA-256: a945e36b36ca5f969ae2c93070a6c462bbe0cad5744feaa2e144b37b045c8edd
font_01_sfnt_off0001cee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEE0 13712 bytes
SHA-256: 233739082ca969add28ea76177f4bc071224c46d634e75048b63e166746ac845

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