Malicious PDF — malware analysis report

Static analysis result for SHA-256 55fe2d0e56594d2b…

MALICIOUS

PDF

62.2 KB Created: 2021-01-20 10:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6ddf6f0d6a5df30cbadd7759702cb37c SHA-1: b6298c6231bd22ae4dae8aa4acd8bd41f5caee46 SHA-256: 55fe2d0e56594d2b632e9d2b41aa66b79a70a46992b111908fd35935c6258933
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, indicating a high likelihood of malicious intent. The embedded URL 'https://trafffi.ru/123?utm_term=tunnel+run+unblocked' suggests a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to exploit vulnerabilities or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=tunnel+run+unblocked PDF link annotation
    • https://cdn.sqhk.co/dedenijikal/ic6anhb/lobajumupubomufaxur.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/jchghah/telecharger_tubemate_apk_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/eggSOha/wavanewenurirasajaboguxor.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/gdTRzn7/11745897077.pdfIn PDF document text
    • https://site-1212104.mozfiles.com/files/1212104/xerojugesek.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/tsyjdkc/keyboard_piano_for_beginners_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/gcjdIjh/chess_opening_blunders_full_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/ijiFZhc/99145234571.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391305/normal_60035377b9610.pdfIn PDF document text
    • https://cdn.sqhk.co/todusukiraxi/hxWghSx/cosmoprof_locations_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lemijafuw.epizy.com/determiners_sentences_with_answers.pdfIn PDF document text
    • http://kewivawegimomu.epizy.com/adobe_xd_template_iphone_x.pdfIn PDF document text
    • http://gavojomizam.epizy.com/my_aged_care_assessment_manual_march_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/31805022626.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_off0000bb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB23 4700 bytes
SHA-256: bf35efcec4673ee374aa745af50bc81d6eb45c05561b80b2d5fcccb5e3b26a20
font_01_sfnt_off0000cb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB29 9664 bytes
SHA-256: 5898de327c95f3293c531e69faf642fba9cecb12c6383baa91b173d66580b69a