Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d4a6657971026e…

MALICIOUS

PDF

71.5 KB Created: 2021-02-11 21:58:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 254318968bd3c93f109322802d009a30 SHA-1: 41da4fbc36a82ffc68ca97d365dd153625284716 SHA-256: 16d4a6657971026e636c0a2ae45d2c58a4f99e02e95f6b2276014868481b80c6
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, suggesting it's designed to redirect users to a phishing or malware distribution site. The presence of PDF-specific heuristics further supports the malicious classification.

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://jottigo.ru/wix?keyword=absurd+things+said+in+the+bible PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369775/normal_6003b37bc22e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476939/normal_5fddae13c1e72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485927/normal_5fc986e53f8ab.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/gdSghhj/17795414649.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/jiiiiib/carnival_games_online_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_6014e517b1fee.pdfIn PDF document text
    • http://chemistryplus.space/cute_wallpapers_for_computer_screenp998e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384480/normal_6003a9550a5a9.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/jenagubadopi/15426292220.pdfIn PDF document text
    • http://jugututinotu.rf.gd/fastanime_watch_anime_online_tv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/daftar_asmaul_husna_dan_artinya.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/allen_bradley_safety_relay_440r_manual.pdfIn PDF document text
    • http://wufajin.rf.gd/21679969478.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_off0000da53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA53 5216 bytes
SHA-256: 4e648e607bb8d7e3dc5897c18c4f89e605183f87925791a8c4d086044be7d042
font_01_sfnt_off0000ec03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC03 10892 bytes
SHA-256: ae7fa4819ba6f3461f6141eb65e7ec729c008f918c513f6141090caf7d33d1b8