Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2147cc06340b01…

MALICIOUS

PDF

67.0 KB Created: 2020-12-21 08:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d024f6dd7bfe897559465ebb29905209 SHA-1: 8512e3a6ec683e2b1c93ae3464598d35c6b793cf SHA-256: 5e2147cc06340b011b7d982f38db283ec6deb1aba644469a0e76463b91d8ec20
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it is a malicious redirector link, pointing to a URL that is likely part of a phishing campaign. The ML classifier also strongly flagged the PDF as malicious. The embedded URL is presented as a free download for a "Christmas weather theme pack", which is a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?utm_term=christmas+weather+theme+pack+free+download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4416921/normal_5fc8816b20329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_5fa197ecdc31b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489429/normal_5fdff241802da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413002/normal_5fd7f87de7fbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390323/normal_5fc540769c9ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc65387c30a162e0c778fd7/t/5fcce65383d2ac65cc13c5d4/1607263830567/keyboard_switch_colors_explained.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdd38a3bf4b14aba341ea/t/5fc15a8d5147b1480465f343/1606507150757/alice_green_john_green.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/molukufofekojup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f855b7a6-f2df-406b-9b54-e737aed70115/edu_games_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/zadufuxakave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae85a16-9e8a-4200-bab1-44ac2e1a7e85/download_auto_clicker_for_chromebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ffb40c6-57c6-494a-b8c4-48c7de6e239c/sea_urchin_background_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7757bd7-05a6-444a-bbc9-04b4c963920d/brag_sheet_template_navy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d447e399-892e-4c0f-b3b0-b4cbf90172d8/20171918195.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_off0000c87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC87D 5456 bytes
SHA-256: 2013b5289e465c2ebfbf569874671974289b84d3696cb191e94e0bb6396ca95b
font_01_sfnt_off0000dae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE9 10564 bytes
SHA-256: 02d8e5399a141acbc763b244dd7fce517b1e3e62c4e36c3605a5a22d5cbe184f

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