Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f220d2742ea7a61…

MALICIOUS

PDF

72.8 KB Created: 2021-01-25 05:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7dbfd3f77ccb234a2c27168769024b97 SHA-1: 5d2ab24219e765cc1293aa046bc68a2b6246b767 SHA-256: 4f220d2742ea7a616c7c340dd84b44e72519c1b67068f9fb7698bda5c78b7735
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'jacksth.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to reference product details, reinforcing the phishing lure.

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
  • 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://jacksth.ru/123?utm_term=tcl+roku+remote+with+headphone+jack PDF link annotation
    • https://cdn.sqhk.co/goluxewimabu/iPjhiji/ordinary_red_serum_ulta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419437/normal_5fe54ece03591.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418991/normal_5ff2976c10c57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496014/normal_6005f8487244f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5fd7b77fc2d16.pdfIn PDF document text
    • https://cdn.sqhk.co/nazabimon/eijYghg/buwemapakatazuwitosuxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461211/normal_5ff3a52e5500e.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/nvUC0ie/word_family_definition_and_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/xowoluve/0sgYwVw/castleminer_z_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jizonizop.rf.gd/ieee_latex_template_tutorial.pdfIn PDF document text
    • http://bajokekez.epizy.com/kavizorimukasatamolafuke.pdfIn PDF document text
    • http://kiroxivox.epizy.com/serapupo.pdfIn PDF document text
    • http://kamiwivexa.epizy.com/cypher_neo4j_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/transformers_autobots_names_list.pdfIn PDF document text
    • http://pufupivati.epizy.com/esma_guidelines_aifm_delegation.pdfIn PDF document text
    • http://jitapalerex.rf.gd/prostate_cancer_treatment_option_guidelines.pdfIn PDF document text
    • http://pavipalu.epizy.com/69880930941.pdfIn PDF document text
    • http://wuwepapose.epizy.com/chivalry_medieval_warfare_latest_patch.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_off0000de67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE67 5316 bytes
SHA-256: 4b3d7736925818b01a4d0ab06f6fb758e885219af8fcb97e085e791997af41bd
font_01_sfnt_off0000f064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF064 11080 bytes
SHA-256: 65728e1933ecd0f12b2cbdca7208cb5b87b90166273de87decabb9706e64cfad

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