Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec829d30fe79a02…

MALICIOUS

PDF

72.0 KB Created: 2020-12-19 20:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 999313879ce2371ee2ba77f40429b1f1 SHA-1: 795aa7867ad06c9e3e783f99f80b121eaacc1705 SHA-256: aec829d30fe79a02241364b28c15d61937ed37b99450c2fe3b464571d72f8457
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URL pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Sea of thieves chicken cage' 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=sea+of+thieves+chicken+cage PDF link annotation
    • https://bulavanu.weebly.com/uploads/1/3/4/3/134341337/dizarutal.pdfIn PDF document text
    • https://gunowiwusofemu.weebly.com/uploads/1/3/4/7/134705227/kakavaxini_voxikufaxaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450160/normal_5fb87442bb855.pdfIn PDF document text
    • https://rosikotukixaru.weebly.com/uploads/1/3/4/3/134312973/lalova-zemab-dilitilusiw.pdfIn PDF document text
    • https://muwudenejudazo.weebly.com/uploads/1/3/4/6/134677543/7403530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459470/normal_5fd3770bdc110.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://uploads.strikinglycdn.com/files/ca6ee20c-c6a3-4b19-a146-abe5c52addf4/jivaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/81391282935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00757c03-95a6-4eaf-8dbd-0a649683d59a/89900838289.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/bmw_e36_auto_to_manual_conversion_wiring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531a58de-c601-4250-a7e2-6d34ffc8da39/tagaxajinafasinikexufigim.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_off0000d1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AB 5032 bytes
SHA-256: ef3b830741b3164542ba8413616606af042f011be4f3c59fc2f14a54417c7387
font_01_sfnt_off0000e2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C3 10064 bytes
SHA-256: 2128ac094dd7670677acbcad3398322fe824f97946eb3315de71e3b187723789
font_02_sfnt_off00010546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10546 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34