Malicious PDF — malware analysis report

Static analysis result for SHA-256 859e764f78100aee…

MALICIOUS

PDF

128.8 KB Created: 2021-02-17 07:53:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 39949e62ef613b23d5def5b318d9844e SHA-1: a3b3052d1aec46ed8d38c1246b8c7f287c7dd673 SHA-256: 859e764f78100aeedb5d979ca47c0de61b4e409e9c72b4513e7fbf82967609dc
214 Risk Score

Malware Insights

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

The PDF contains a large number of links to external websites, many of which are flagged as malicious redirectors or part of a link farm. The document body, though heavily obfuscated, appears to contain keywords related to website creation, suggesting a lure to disguise the malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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.
  • 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/123?utm_term=how+to+create+a+website+with+wordpress+for+beginners In PDF document text
    • http://rilizikurejoru.22web.org/fraction_worksheets_8th_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/bzgf0WY/sexadu.pdfIn PDF document text
    • https://bafumujem.weebly.com/uploads/1/3/4/4/134498711/wabonize-vupigukira-silanovogeguk.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/d9666Gj/stachu_jones_wszystkie_teksty.pdfIn PDF document text
    • https://cdn.sqhk.co/nezazexador/IhcgiSF/n64_emulator_android_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/gjgtDjd/68750753339.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/jayeBHs/cute_cats_talking_to_each_other.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/enhilfD/pisulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/sony_bravia_49_inch_smart_tv_manual.pdfIn PDF document text
    • http://sefuvasumujezoz.epizy.com/79964601768.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/precalculus_texas_edition_textbook_answers.pdfIn PDF document text
    • http://linopiziv.epizy.com/5th_grade_math_multiple_choice_questions.pdfIn PDF document text
    • http://gabamad.epizy.com/wupumabebekej.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/gejax.pdfIn PDF document text
    • http://puwepubofixa.epizy.com/uber_earnings_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/48380812691.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/bomalozedilerijatewodire.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/weekly_house_cleaning_template.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001851b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1851B 15764 bytes
SHA-256: b8d3fe3b0970f5b11d52c4fb4e3955ef33cc2a13a3b6029443dfb4def5e5963b
font_01_sfnt_off0001ab0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB0A 5364 bytes
SHA-256: 4cabb8d32a74ad56e860bd10eac00a532d4f7aa40cdad53ee33b2d55af5a2973
font_02_sfnt_off0001bd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD42 11576 bytes
SHA-256: 676cbd4eaf9adc5dfb293e0188c040aadfba3291e69bcc7c99ddbab0d6985312
font_03_sfnt_off0001e4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4BE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.