Malicious PDF — malware analysis report

Static analysis result for SHA-256 e671586e54790d84…

MALICIOUS

PDF

77.7 KB Created: 2021-02-06 00:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 51c076e0ec1de4cc98ad0333dbe37c27 SHA-1: c618ed68ad98de189c3372da8c48e1b0835fdd8e SHA-256: e671586e54790d84e8b4e653820cee1786d9084b05690ac2c15f1532b245e95f
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=favored%20enemy%20pathfinder%20guide In PDF document text
    • https://bumozirejukije.weebly.com/uploads/1/3/5/3/135340746/lifebaguzinin.pdfIn PDF document text
    • https://runewabelew.weebly.com/uploads/1/3/0/8/130813516/895dcca7a7f6.pdfIn PDF document text
    • https://bigakajufejala.weebly.com/uploads/1/3/4/2/134265656/7879320.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/1a4d8.pdfIn PDF document text
    • https://bexokibuki.weebly.com/uploads/1/3/2/3/132302940/fusetebinini-biponusoto-bonuxowelafa-kosinomumezelo.pdfIn PDF document text
    • https://bikujezojodu.weebly.com/uploads/1/3/4/5/134587809/a746060a.pdfIn PDF document text
    • https://zawuziwoju.weebly.com/uploads/1/3/1/6/131636930/211500.pdfIn PDF document text
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/2681443.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/0a47f8ac08880.pdfIn PDF document text
    • http://loxebosobudi.66ghz.com/hornsey_park_surgery_cqc_report.pdfIn PDF document text
    • https://napolapivu.weebly.com/uploads/1/3/5/3/135303388/sixabutejex.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/jivagajamav/76331466795.pdfIn PDF document text
    • http://fakuzilezozo.epizy.com/delhi_university_bms_application_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/ajax_datatype_for_file.pdfIn PDF document text
    • http://pipinodojo.epizy.com/reruguduke.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/79299906446.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/provisions_of_compliance_audit_guidelines_of_cag.pdfIn PDF document text
    • http://zerujafulo.rf.gd/5271712526.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_off0000f122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF122 5364 bytes
SHA-256: 387b859b6d875834307d7e5d0c5471d116e0ad925d146f64af97d50e0e1aa307
font_01_sfnt_off0001034e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034E 11468 bytes
SHA-256: f1680249433d024bffd0b01cd358cc239df455bec9d6ca82cda70c2c1993b394

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