Malicious PDF — malware analysis report

Static analysis result for SHA-256 3543ee2d6707c006…

MALICIOUS

PDF

74.6 KB Created: 2021-02-17 10:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8e890fb994b3aa66bfa4b7db99ca35b0 SHA-1: f071a3caed6f899823a33d2fd8019494785e88c2 SHA-256: 3543ee2d6707c0062fa0c8d3628ecb717727c38ff1ba9e59c09d75b7621706c9
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The document body, though heavily obfuscated, appears to contain text related to quantitative questions, suggesting a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/strik?utm_term=what+is+an+example+of+a+quantitative+question PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474736/normal_5ff4ad640c9eb.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/jJjdAZl/candyman_movie_2020_watch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420767/normal_5feffe74f333c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367952/normal_5ff85e4c67272.pdfIn PDF document text
    • https://cdn.sqhk.co/fimirexuf/giHihig/winking_owl_box_wine_review.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/Y7bgdha/pancake_artist_los_angeles.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/miya_bhai_punjabi_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/60295481045.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/nizaj.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/ad_block_mobile_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/63525669641.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/barsaat_movie_songs_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/connect_4_addition_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/lemanepabejufedijatex.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/29952074775.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_off0000e666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE666 5312 bytes
SHA-256: eb4f6c185740c64e317f4e3dee1a1d7385d05141e477b1137d3b86d73a40847a
font_01_sfnt_off0000f86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86E 10864 bytes
SHA-256: fae3dd3ef4921b456c641e534271e7380dd1006a1eecf39cf8c1a93414b4af53