Malicious PDF — malware analysis report

Static analysis result for SHA-256 539dbec63e3edf6a…

MALICIOUS

PDF

70.5 KB Created: 2021-01-06 16:08:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0b4e6a9bc84d38b89e460ec01c46c3a2 SHA-1: 98e7bc8d2dfe25c5021da3873ac5f02602990db0 SHA-256: 539dbec63e3edf6a95913e5ca9424e441455cc188761baa178d48c907264723a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that masquerades as a download link for a 'player's handbook'. This URI, 'https://traffine.ru/123?utm_term=player%2527s+handbook+5e+pdf+download', is likely intended to lead the user to a malicious download. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://traffine.ru/123?utm_term=player%2527s+handbook+5e+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490377/normal_5fd68d749ce64.pdfIn PDF document text
    • https://cdn.sqhk.co/depifozopupe/Z1ihQgi/photo_mix_app_for_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/vigamodijek/jegcCGu/smartwool_merino_250_crew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ef3bf0-63df-42f9-ab37-49d0c4061618/hombres_desnudos_con_penes_grandes.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/free_3d_music_player_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5fd545-3ad6-46c2-85d4-cbf262705878/hindu_creation_story_purusha.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/big_little_lies_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/dragon_vs_wyvern_vs_drake.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/nowibazofetataf.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_off0000d65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65F 5688 bytes
SHA-256: fbec16bee390a3a888630a154c6fadf907dd8d4a0d73c05f3eebcc9962c617b5
font_01_sfnt_off0000e9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CB 10444 bytes
SHA-256: a80da02c291ea845628d1e08bbde421c848bd990591d8d81dc70a9d811695786