Malicious PDF — malware analysis report

Static analysis result for SHA-256 36afb6ffe5d107fb…

MALICIOUS

PDF

73.0 KB Created: 2021-03-03 17:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: c21f03a9c6e88d87a0dc845f6142bda3 SHA-1: b90b69bdf33275155f291177489112316183ee4f SHA-256: 36afb6ffe5d107fb5a571059d87e79d8f8694716741962edc47d5f4e8edaaa82
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, suggests a lure related to a 'Skyjack sj3219 service manual'. The embedded URLs likely lead to the download of a second-stage payload, characteristic of phishing or malware distribution campaigns.

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://lozipotod.ru/award?keyword=skyjack+sj3219+service+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388841/normal_602e6b0772bf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_602c923cf341b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378381/normal_60045b4e72025.pdfIn PDF document text
    • http://wofixizufiw.22web.org/1256910973.pdfIn PDF document text
    • http://ductsunlimitedins.com/2018_amc_10_problemspnmzw.pdfIn PDF document text
    • http://adv-workshop.site/black_army_combat_uniform4boeq.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/cWgghjJ/car_racing_games_for_pc_free_download_offline.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nimuwet/ethel_smyth_sheet_music.pdfIn PDF document text
    • http://dadojusox.epizy.com/noaa_climate_change_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/anniversary_logo_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/37329745786.pdfIn PDF document text
    • http://pomukipokap.epizy.com/busob.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/xowib.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28B 5544 bytes
SHA-256: f6a06d1097facf9aa1e9c02b9becfe29e65c165557b53a1993163d9401290bd6
font_01_sfnt_off0000e544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 10388 bytes
SHA-256: 7655d7d1c52ade686dbef03c5d7c79d0be335ba42d5d8a38d044656ca95c9436
font_02_sfnt_off000108d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c