Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f79ba154fe21ada…

MALICIOUS

PDF

76.3 KB Created: 2021-03-17 20:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abba23ca2a051bac861f13aac707ab63 SHA-1: 36d910fe5ba8a7c23651d11c8b7e0ff303cd2253 SHA-256: 2f79ba154fe21adaac14cef72e5fce99e64231cba2e2e80c02fd7f5536a1c7c1
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, identified by heuristics as an external URI and flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'fauna caatinga pdf'. The presence of this URL and the malware detection strongly suggest a phishing or malware distribution attempt.

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://xezojetit.ru/award?keyword=fauna+caatinga+pdf
    • http://xtreme-sport.ru/harman_pellet_stove_for_sale_canada1c3j2.pdf
    • http://1yamal.space/gobozinuvogek58jcc.pdf
    • https://cdn-cms.f-static.net/uploads/4419424/normal_60412d06586fb.pdf
    • http://afracheat1.xyz/how_to_restart_a_weil_mclain_boilerp4kor.pdf
    • http://sodalabs.club/arturia_beatstep_pro_midi_controller__sequencerxflwi.pdf
    • https://static.s123-cdn-static.com/uploads/4393889/normal_60037d27745b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pusolefosex/most_reliable_cars_2017_consumer_reports.pdf
    • https://uploads.strikinglycdn.com/files/45f13497-118d-4434-9ebc-1ce6a99d54f5/jadij.pdf
    • https://uploads.strikinglycdn.com/files/9938405a-1392-4d43-a436-196540c6ebbc/rinarijudu.pdf
    • https://s3.amazonaws.com/gotenukevepunin/excel_numberformat_percentage.pdf
    • https://s3.amazonaws.com/belopudevuzuza/imagenomic_portraiture_2_32_bit.pdf
    • https://uploads.strikinglycdn.com/files/9c0db6f8-1eb4-47fd-a16a-184307edb898/how_to_charge_your_jlab_wireless_earbuds.pdf
    • http://dizoterimivitap.rf.gd/25253983440.pdf
    • https://uploads.strikinglycdn.com/files/4c08f7d2-1967-45e0-a5a3-cf50d42b73b8/87471771842.pdf
    • https://s3.amazonaws.com/patilawasu/angry_birds_transformers_hack_android.pdf
    • https://uploads.strikinglycdn.com/files/41760949-766b-407e-ab4f-9999a2bf5a4a/algebra_de_baldor_caso_1_de_factorizacion.pdf
    • https://uploads.strikinglycdn.com/files/bbbde58d-e27e-4dd1-aac4-cd53d0133374/37550895430.pdf
    • http://lejubegow.epizy.com/transformers_prime_optimus_prime_x_reader_fanfiction.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb6d.bin
45054105824f583de35940680bd9b66244b2df95409758c76df30a78d079e955
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6D 4972 bytes
font_01_sfnt_off0000fc71.bin
72bb28f1ba2c7d5abbebd0cd5f94914441294105cad936d1579f9674d6c07eba
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC71 13248 bytes