Malicious PDF — malware analysis report

Static analysis result for SHA-256 033b27288bc58638…

MALICIOUS

PDF

71.8 KB Created: 2021-02-21 13:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fddb4c6160291e8853fc1432808b8d36 SHA-1: 215e85c75af8e41547dbe5fb70c80a1b7e652e7c SHA-256: 033b27288bc586385c893257114697eda6a8074a4406f67f537fed4ed3fd10d2
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious link as a search result, likely to trick the user into clicking it.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=what+are+the+four+elements+of+fashion+design In PDF document text
    • https://cdn.sqhk.co/fepexeguma/hjhJ4eC/north_star_casino_bowler_wisconsin.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/bgeKhjE/smoke_editor_steam_effects_photo_studio_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/pQhh1YA/62732725437.pdfIn PDF document text
    • https://cdn.sqhk.co/pefatipi/pzLhfgj/block_private_caller_id_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/C3liejj/38059790432.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/sosupejuxofedo/bigunetidaliki.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/itinerary_template_for_family_reunion.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/5743793865.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/50569761124.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/luduxiwidemikapinisak.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/boomerjacks_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/eclipse_latest_version_free_for_java.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/bhojpuri_song_mp4_2019_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/countersunk_screw_in_sheet_metal.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/ticket_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/pipozubuwetotabowakulala.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_off0000ddb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB5 5332 bytes
SHA-256: fca50360efa7efd4595e45aea44307edd2e2cf3b65042c71478b84aba5d41278
font_01_sfnt_off0000efb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB8 9948 bytes
SHA-256: 5bd17e0cd24add76c4769a0d29b70b539f5e0a4ba657215edfda27de3ebed52e

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