Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54366072252e14f…

MALICIOUS

PDF

68.4 KB Created: 2020-11-24 05:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5435be1b30a0e05258f60a75e14d785 SHA-1: ca8a1702f5cb1fedd00276eddd9ee5e1c117e69a SHA-256: a54366072252e14f21112b11dc5fe5f872b446d7d19a5052199a8f0afa145699
254 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, indicating an attempt to lead the user to malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into downloading a password-protected archive, likely to bypass security scans. The presence of numerous embedded links, including one to a malicious redirector, points towards a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffmen.ru/strik?utm_term=baixar+windows+7+todas+as+vers%25C3%25B5es+pt
    • https://suzigenetulaja.weebly.com/uploads/1/3/4/7/134756603/c13ad581d40.pdf
    • https://noloturajikule.weebly.com/uploads/1/3/4/4/134486045/mabirixeraras.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/guwutivupudutu/58718533795.pdf
    • https://s3.amazonaws.com/norozovijalu/annotate_on_onenote.pdf
    • https://uploads.strikinglycdn.com/files/0744cc52-6105-4493-a176-c2bae64c9a72/7463201253.pdf
    • https://s3.amazonaws.com/nonabafat/zemupiz.pdf
    • https://uploads.strikinglycdn.com/files/f6b06f60-9a54-4d5a-b86e-1fd55f4ff66b/guilty_hell_airi_download.pdf
    • https://uploads.strikinglycdn.com/files/8353580a-f875-457b-9910-83cf93c8cd25/navutanalogerujegisabanun.pdf
    • https://s3.amazonaws.com/dotivaf/acer_swift_3_spec_sheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8fd.bin
d13490837635133bb22d333edf891b6061af4694532ffa1000b6b978a81dcac6
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FD 5488 bytes
font_01_sfnt_off0000db96.bin
f2eab503377c14b22fc98811891bde2aa0c48fb18ae17adef4bbf3021f2264da
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB96 12924 bytes