Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b75ea815be7cc9…

MALICIOUS

PDF

72.3 KB Created: 2021-02-22 07:12:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2f449dcab1d5f88baaba56b07387f6ae SHA-1: aa0fdfa3154cef3e643eaf4d7499e95d78fcddd8 SHA-256: 07b75ea815be7cc91f96dec75c091ecd7d875578b745563864e79585a0bf6653
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain text related to cleaning grill grates, likely as a lure. The primary IOC is the malicious URL found within the document, which is designed to redirect users to further malicious content.

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
  • 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.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+clean+char+broil+tru+infrared+grill+grates In PDF document text
    • https://cdn.sqhk.co/sowodopevew/gnjcsdr/best_pick_me_up_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/xogeloke/b1jajcO/casino_med_rapid_transfer.pdfIn PDF document text
    • http://fewizoge.22web.org/blitzing_biology_12_sample_answers.pdfIn PDF document text
    • http://molotkov.site/background_solid_blacksjmqs.pdfIn PDF document text
    • http://jobauthor.online/yamaha_rx-v373_will_not_power_onpoze3.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/remeranexe/xemukowod.pdfIn PDF document text
    • http://fuvituze.epizy.com/chromium_web_browser_for_ubuntu_14._04.pdfIn PDF document text
    • http://tewaremiluzavag.rf.gd/kugix.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/76080707015.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/86118957476.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/34714774261.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/bic_america_f12_12-inch_review.pdfIn PDF document text
    • http://kidaxuv.epizy.com/57404946616.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/effects_of_stress_on_nurses_performance.pdfIn PDF document text
    • http://mitoxewer.epizy.com/3602755429.pdfIn PDF document text
    • http://bekazutebazifob.rf.gd/90580215183.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_off0000dc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC49 5476 bytes
SHA-256: 3424feaa99354dd54d1dab6f0299848c4d1712746ec67461761c57b977e224e4
font_01_sfnt_off0000eeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 10916 bytes
SHA-256: 7fb0207e184bbff08081fd9db3bd3ccf19adfc447c6c39534fe8eedde1019ca2

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