Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b323d2cf50ceb6…

MALICIOUS

PDF

65.2 KB Created: 2021-01-13 10:00:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8d571b1c31578370b20b69dc260453e6 SHA-1: 34040b1e5f94ec2a9994e3f610f0ded6cbd6614e SHA-256: 59b323d2cf50ceb610cd6772fe2fde630e7a6e8bbf7adf2ed923d90a9c786b52
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, identified as a link farm, with one link pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the extensive link farm suggests an attempt 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://traffine.ru/aws?utm_term=the+sheets+lyrics In PDF document text
    • https://static.s123-cdn-static.com/uploads/4383702/normal_5fcb4a56dbc3e.pdfIn PDF document text
    • https://site-1177746.mozfiles.com/files/1177746/overkill_3_pc_keyboard_controls.pdfIn PDF document text
    • https://site-1171473.mozfiles.com/files/1171473/32568315908.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420902/normal_5fe276c09da0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420260/normal_5fc7fedd0bab0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379374/normal_5ff77602588b9.pdfIn PDF document text
    • https://site-1196452.mozfiles.com/files/1196452/2_player_ps4_games_offline_free.pdfIn PDF document text
    • https://site-1209772.mozfiles.com/files/1209772/zezifiputoxil.pdfIn PDF document text
    • https://tusukufuduma.weebly.com/uploads/1/3/4/4/134458322/matulusopivosigawo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417662/normal_5fed54ea4fbbf.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/byagjDl/mopemubina.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/ehjjgih/name_this_song_for_me.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/bikikanafopavu/design_engineering_gtu_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/scholarly_journal_articles_on_transformational_leadership.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_off0000c5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EC 4728 bytes
SHA-256: 48824c572fb505f2d09d734d0499941a949aea73620e5070b0046125f27b6fce
font_01_sfnt_off0000d606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD606 10160 bytes
SHA-256: e948da54f89c0935dde2e641e89e2df437c3a4a790fb08d64bf5ad5b97c9c697

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