Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4259ef8c234c5b…

MALICIOUS

PDF

69.1 KB Created: 2021-02-03 20:09:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4dd4ac58065e9d325786f5fed7094ee1 SHA-1: d357bcd26384d871c59dc3b4ec473e9f58920bb8 SHA-256: be4259ef8c234c5bb2981161f9bee4ab6ab96ed38409fef0c1f13f7fb18f57b9
214 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=springfield+local+schools+akron In PDF document text
    • https://cdn.sqhk.co/jabupexipa/ihi4ieY/bamexizemedogo.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvezunotumu/cRjemca/frog_stamp_jumps_exercise.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/vha29jh/januxulekedonezovi.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/zjb6VCs/18828311294.pdfIn PDF document text
    • https://cdn.sqhk.co/menaleratupo/fugfoic/street_fighter_4_pc_download_highly_compressed.pdfIn PDF document text
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/faniko.pdfIn PDF document text
    • https://suwesinorilofev.weebly.com/uploads/1/3/4/0/134096988/8250709.pdfIn PDF document text
    • https://fugunukotuji.weebly.com/uploads/1/3/4/5/134589730/f5ead1de1dda.pdfIn PDF document text
    • https://cdn.sqhk.co/nunemiziku/JW9Xggv/happy_30th_birthday_cake_topper_svg.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/veraxawewib/39432037449.pdfIn PDF document text
    • http://varoniwarovez.rf.gd/sukevibabazu.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/3757531704.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/yankee_doodle_dandy_clarinet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/block_format_business_letter_example.pdfIn PDF document text
    • http://turebaso.epizy.com/stormtrooper_helmet_template_foam.pdfIn PDF document text
    • http://rivebop.epizy.com/nomimizavuvexutikeruted.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/nexam.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/34745290107.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/rasarunamotutabirabenu.pdfIn PDF document text
    • http://jusakurufawotol.rf.gd/cataratas_del_niagara_canada_informacion.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC7 5584 bytes
SHA-256: fc056bdd1b1edb78e4419e146ee015251f899b40502cdfcb77ac17d8dedbd364
font_01_sfnt_off0000dfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC4 11572 bytes
SHA-256: eeaa6b9bc50ee794c20031bbdcd4aeccc0f970387a6a143cb7d479cca515374c

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