Malicious PDF — malware analysis report

Static analysis result for SHA-256 824448e3466953cb…

MALICIOUS

PDF

70.6 KB Created: 2020-12-31 08:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b39d75ee01764bd6f97cbe2aa2629258 SHA-1: b0eb96c42d69d0c2c87655d5f947243b257e7651 SHA-256: 824448e3466953cb764743a15e95f59de890ef90d8ea483fcdacc29c65ec0b39
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=twisted+crab+coupons In PDF document text
    • https://cdn.sqhk.co/sejujona/hjshcgc/38846699394.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/jhcMgek/download_bounce_original_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tesinogopano/RSBo2c0/rankin_bass_productions_movies.pdfIn PDF document text
    • https://gopikuximodel.weebly.com/uploads/1/3/1/3/131384340/7256691.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/zinezajaxuberew.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/geidzxf/wawosevegixenen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/12216b4c-8cca-414f-9d43-626e866fe37c/92927584578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f70ca527-b2b9-4030-bef5-1a6a64e84e8e/jefuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ababc06-f3ba-4f74-8958-143da0994a2e/14423409436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df5e48c-116f-4e62-9713-2cb9b3181fd4/the_kite_runner_essay_conclusion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafe50c7-4883-4ca6-ab81-aa9276e36419/29532696036.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/xbox_rechargeable_battery_stand.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/bangla_chobi_photo.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_off0000d5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E1 5216 bytes
SHA-256: 431c6e7178e96e031477097cb0f5e4e4cbfed229a765761e1f3c0c40f622523c
font_01_sfnt_off0000e7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B9 11180 bytes
SHA-256: 572dfedbf39f0de0657110e144aa3a4c955adde71433e7937141150ca4c0caaa