Malicious PDF — malware analysis report

Static analysis result for SHA-256 550127b1661e5961…

MALICIOUS

PDF

58.2 KB Created: 2020-11-19 17:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-04
MD5: 9b558d2dee79ce8eea825aa3e7fc1cde SHA-1: bcdac2623a3a897228003326a740fc1c7edae692 SHA-256: 550127b1661e5961c90ed2f59c0583dd62e7f2e593fd08f571e7adfd7ead5d86
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://s3.amazonaws.com/jolozidabi/geometry_dash_clutterfunk_piano_sheet_music.pdf In PDF document text
    • https://nitaluba.weebly.com/uploads/1/3/4/3/134348735/7929122.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/summoners_war_beginner_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/amsterdam_cartina_turistica.pdfIn PDF document text
    • https://zoseruvabu.weebly.com/uploads/1/3/4/4/134492528/fujibugifepukadif.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/xezureduw.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/ladewepuminerikusibadopo.pdfIn PDF document text
    • https://kuruxodevudule.weebly.com/uploads/1/3/4/7/134728431/2bfe6dbb2a4e91.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/vesexafuvukigis.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/answers_to_density_practice_worksheet_1.pdfIn PDF document text
    • https://trafffi.ru/wb?keyword=cece%20winans%20i%20promise%20freeIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000a907.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000a907.bin)
    • https://uploads.strikinglycdn.com/files/84852ae9-e0f1-4eb2-a1fc-60dd52587123/71605870647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6db656e-a36f-4530-bbc1-9593c32e17e1/fatakirirazun.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 extracted file (font_00_sfnt_off0000a907.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA907 5124 bytes
SHA-256: 5efc18005490a6925d9194ae36e0590ba59ccdf2e142b04b7d8fe8a354099c80
font_01_sfnt_off0000ba71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA71 9964 bytes
SHA-256: ea23bd29c4fa5319a97e7b755f156ecf7fab523567edd9131bb9e3d6eb7a141b