Malicious PDF — malware analysis report

Static analysis result for SHA-256 2982b9e368743108…

MALICIOUS

PDF

66.3 KB Created: 2020-12-22 05:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: b42f4da19cc35c31daa791a1506beee1 SHA-1: 76592a5c93c400d5c30073e8dabd1360408021ac SHA-256: 2982b9e3687431080481f6e96fb0006f5a3650b8db2ccf8f5bf7994cbd0299d5
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature, flagging it as a phishing trojan. The document body, though heavily obfuscated, contains text related to a 'virtual run' and the wkhtmltopdf application, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=monster+dash+virtual+run PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378856/normal_5fa1258ec7ad6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391037/normal_5fcbe80a8e2ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5fa50196e98a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5fd26a56d5de0.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/5fc0b5bec30a162e0c519083/t/5fc37d31145a8629dc1d5d09/1606647089291/16781638518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6994e73-ba9e-46d2-b1b4-1955a28b46e4/parking_at_lowell_train_station.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd1ee2a-3be9-4614-9ce6-6d0455cd2a8c/2805942218.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/carlos_wizard_livro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42cfd1c8-c624-41d7-84ab-efd4e4dfdc1f/95969612283.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77b74849d1727bc12ab1a/t/5fd67e66164d0f203c7ff81a/1607892582985/chemistry_12_experiment_19a_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/fire_emblem_the_sacred_stones_randomizer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/452bcede-11fd-44b1-bfa3-62d0741a1de4/vukogap.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_off0000c699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC699 4976 bytes
SHA-256: 2bad03e1d8aa0216416d5f8e73cbf26bbd2d09093c8600d9ae79b7cf8312845c
font_01_sfnt_off0000d78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78D 10892 bytes
SHA-256: db565b3d740721a4a5c01403a09288e30686d7969e89e2199a8dc7b82a63b313