Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b45fb800ce0cd7…

MALICIOUS

PDF

71.6 KB Created: 2020-12-23 06:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02d07c34736c7acc69658793f6246602 SHA-1: 57cd8bae63fc9bc6a6ea2e7661563db5bc79b10e SHA-256: 28b45fb800ce0cd7a27ef8d785c464287b4ddb80814bcc88c2b388e48eb90b29
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to trick users into downloading further malware. The document body, though heavily obfuscated, contains text related to a game download, aligning with the phishing lure. The presence of a malicious redirector and the phishing lure strongly suggest a malicious intent to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=toy+blast+game+download+now
    • https://cdn-cms.f-static.net/uploads/4392660/normal_5f90d4bc8bfb6.pdf
    • https://cdn-cms.f-static.net/uploads/4412996/normal_5fc284b4cb122.pdf
    • https://cdn-cms.f-static.net/uploads/4384304/normal_5f98496089ce3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gurowozenupifi/54190543335.pdf
    • https://s3.amazonaws.com/kopisigapub/hada_labo_3d_sheet_mask.pdf
    • https://s3.amazonaws.com/rezugekolaba/resuj.pdf
    • https://s3.amazonaws.com/xovekolamoxe/piriformis_pinching_sciatic_nerve.pdf
    • https://s3.amazonaws.com/kavitokolezub/17766313944.pdf
    • https://s3.amazonaws.com/vukumesoj/american_sniper_full_movie_in_telugu.pdf
    • https://s3.amazonaws.com/pirofopafu/13._1_study_guide_ecologists_study_relationships.pdf
    • https://uploads.strikinglycdn.com/files/48638196-befa-46f9-8d3c-6b0e053283f2/zelienople_fall_festival_2019.pdf
    • https://s3.amazonaws.com/zolerazowubow/go_ahead_singapore_annual_report.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_off0000d97d.bin
b05cf4f2d28652a8a5dce68d5074ef454e40e022a0d030c1b83cec4f8db4ad5c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD97D 5332 bytes
font_01_sfnt_off0000eba3.bin
74eaff3ae16fbdaa3a8add8fd2cdf9717bbc80a9d805fee48f0bb5be97a8e64e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 11300 bytes