Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d75e4523a092610…

MALICIOUS

PDF

75.9 KB Created: 2021-04-11 14:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aa26ec69185c554102d52312ae18d3a SHA-1: ea45241446ce08be05255aaadce830701223e2bd SHA-256: 1d75e4523a092610cf95a48dbdfe6fd01bb3cf922406e079ff16a96f52404254
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'nipisod.ru', which is likely the primary distribution point for a malicious payload. The document body, though heavily obfuscated, contains text related to drawing tutorials, serving as a lure.

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://nipisod.ru/strik?utm_term=how+to+draw+a+portrait+easy+for+beginners
    • http://pavawafupef.66ghz.com/prakruti_banavasi_english_books.pdf
    • https://cdn-cms.f-static.net/uploads/4383689/normal_6047d3e4883da.pdf
    • https://cdn-cms.f-static.net/uploads/4460954/normal_600ae076f03c4.pdf
    • https://cdn-cms.f-static.net/uploads/4495254/normal_606e72e3b16ec.pdf
    • https://static.s123-cdn-static.com/uploads/4413017/normal_5ff70ce1a805e.pdf
    • https://cdn-cms.f-static.net/uploads/4393900/normal_601dcf73a757a.pdf
    • http://lapogomofirubu.22web.org/reported_speech_questions_activity.pdf
    • http://vovuzug.22web.org/lexamis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sipifubovok.epizy.com/68541978209.pdf
    • https://b3dfd9c9-1030-471f-a26d-814ea73dbccc.filesusr.com/ugd/d97afa_aa1b13bd296d449d85cf79d91f406773.pdf?index=true
    • http://gigavebeno.rf.gd/what_are_the_different_types_of_ecosystem_class_10.pdf
    • https://s3.amazonaws.com/jafujasiwetid/48004523020.pdf
    • https://s3.amazonaws.com/degisapemifa/cha_cha_cha_old_movie_song.pdf
    • https://s3.amazonaws.com/pipaneku/daluzaverewonisa.pdf
    • https://uploads.strikinglycdn.com/files/a617d3b2-a952-4444-b68e-b0f05f464b38/panasonic_nn-sa651s_set_time.pdf
    • https://uploads.strikinglycdn.com/files/7f16fcc1-8e1e-4168-b63d-fb388e9dfbc0/56364539540.pdf
    • http://verepuremi.rf.gd/34043771859.pdf
    • http://bifajone.rf.gd/fategapagasinolatuf.pdf
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_0cb89aba49f14e74a596ea09bea6491d.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae7.bin
6587a4ce74e4aaaa7d09f01ed42983ef8a55d701ab71c319073bd2a411d4026e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE7 5472 bytes
font_01_sfnt_off0000fda3.bin
16df603f19f116ba97d76bcd664ad86179f2b8c37b31bb5dada976890caa873e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA3 10776 bytes