Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0846a5f320c1eab…

MALICIOUS

PDF

68.3 KB Created: 2020-11-29 19:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: acf4d67a177fe7d763558f8557d427ec SHA-1: 978bf7a5c5b3c939fed25f74d64c29a4d0884ad0 SHA-256: d0846a5f320c1eabc8fbfc70167ea95031bc8b23e549eb3313be7992a6add9fc
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://cctraff.ru/strik?utm_term=curiosity+killed+the+cat+but+something+brought+it+back In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_5f8c21ea54e0e.pdfIn PDF document text
    • https://vejegiraforid.weebly.com/uploads/1/3/4/3/134311029/5436866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f9f7d89c5259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fbf64abecd99.pdfIn PDF document text
    • https://tivexafo.weebly.com/uploads/1/3/4/3/134348633/4354184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f8c1ba143709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f87df4300f98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f89123766a20.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/xapidajovaji/gevojogibuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aad5944-e096-445f-a48d-ef52ee996f84/dosajazalawoxapipedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/349f8a72-382d-47b6-954c-0517dcd08dc6/chest_workout_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/le_guide_du_routard_colombie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd466e7-4240-4a43-97c0-2e347aaf757b/90056805764.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_off0000ccf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF7 5564 bytes
SHA-256: 3489f35ec90d15805cfc9979a00acc892135a69984f9ac745198d1c169000bc1
font_01_sfnt_off0000dfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB8 10528 bytes
SHA-256: 1f357a06c2da6c7c6ea10369817f34ef1477523d2439710c430d923b9e974751

Open this report in the interactive analyzer, or submit your own file for analysis.