Malicious PDF — malware analysis report

Static analysis result for SHA-256 682f0d703c528b94…

MALICIOUS

PDF

76.1 KB Created: 2021-02-11 08:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb5d60d53433bff43ab5c76159f478a0 SHA-1: 0f3ac5aad1501ad4b15c20f57c41d413f08d9c57 SHA-256: 682f0d703c528b94f78d341fb6a1d7660d61d68f9404d0ca2698fcb1a7056e61
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document's content, though heavily obfuscated, suggests an attempt to disguise its malicious nature as educational material.

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://maypoin.ru/wb?keyword=comparatives%20worksheet%20for%20young%20learners
    • https://mozevosiku.weebly.com/uploads/1/3/3/9/133999333/faviwaliwonix.pdf
    • https://static.s123-cdn-static.com/uploads/4386607/normal_600865d0bb423.pdf
    • https://vivusujode.weebly.com/uploads/1/3/2/6/132682813/f086a2db3b.pdf
    • https://static.s123-cdn-static.com/uploads/4408004/normal_5fc5f54a5b5f7.pdf
    • https://cdn-cms.f-static.net/uploads/4449012/normal_600e88ef2cbeb.pdf
    • https://static.s123-cdn-static.com/uploads/4369305/normal_6002ed5992851.pdf
    • http://jovedarike.iblogger.org/18633689357.pdf
    • https://gebusoju.weebly.com/uploads/1/3/0/9/130969184/xolife.pdf
    • http://aduo5.online/mayo_clinic_diet_app_android0mjhb.pdf
    • http://vafakewa.iblogger.org/smoking_girl_pic.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jakunivejejaxo.rf.gd/gupab.pdf
    • http://kemixirutuj.epizy.com/tuwivanuladujotofabivas.pdf
    • http://fapizof.rf.gd/23368737051.pdf
    • https://s3.amazonaws.com/fifuto/89623068675.pdf
    • http://lipewolitaden.epizy.com/sujezogomopidufet.pdf
    • http://zezazemana.epizy.com/27450131788.pdf
    • http://tosawos.epizy.com/free_kyuhyun_a_million_pieces.pdf
    • http://dabemekos.epizy.com/grace_unplugged_song.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de4a.bin
1c29de4233d7d4dde7291d1e18e831aec174cd64463213e1013db7d9aca6826e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4A 5540 bytes
font_01_sfnt_off0000f117.bin
a5328fc7402d552721369b3bdd78d50984632e884af14edf63b5cc3d9f09fbbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF117 10524 bytes
font_02_sfnt_off00011508.bin
781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60
pdf-font-stream PDF embedded font (sfnt) at offset 0x11508 4324 bytes