Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d27c37b755af1e…

MALICIOUS

PDF

74.6 KB Created: 2021-03-19 11:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2094adcb0ff4f14dd585a9b54ebb2cd SHA-1: b2f633baa12f6828833efc542a1c536b1231ce4b SHA-256: 65d27c37b755af1e76d60df45b0a229d31db82d3212fcac143c15d4b37a5fcd1
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a malicious domain, identified by ML classifiers and ClamAV as a phishing/trojan. The document body, though heavily obfuscated, appears to be a lure related to cleaning stairs. The presence of embedded URLs and the overall detection by multiple security tools strongly indicate a phishing attempt designed to redirect users to malicious content.

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://botokaw.ru/strik?utm_term=how+to+clean+stairs+with+carpet
    • http://topplafond.xyz/check_your_computer_specs_windows_79zaoa.pdf
    • http://fabujisaw.mygamesonline.org/15872053533.pdf
    • https://cdn.sqhk.co/zinumazak/fXMiahf/77854765664.pdf
    • http://lirifajo.sportsontheweb.net/15508764616.pdf
    • http://trychambre.xyz/28488828092pb9fk.pdf
    • http://kujunat.medianewsonline.com/how_to_turn_off_demo_mode_kenwood.pdf
    • http://vijevejumozugim.sportsontheweb.net/gate_2020_syllabus_ece.pdf
    • http://begemotiks.fun/mr._coffee_12-cup_programmable_coffee_maker_red_bvmc-knx26vro9q.pdf
    • http://vipimuxatomefi.medianewsonline.com/zotosevejegawuxikidixigi.pdf
    • https://cdn.sqhk.co/joxonorapa/umhiogg/tubemate_apk_2020_ios.pdf
    • http://xegizelodirirok.iblogger.org/how_long_to_microwave_a_medium_sweet_potato.pdf
    • http://vixabaj.scienceontheweb.net/piscicultura_em_moambique.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bibosisiv.epizy.com/71099431159.pdf
    • http://mutijisugo.epizy.com/exerccios_diagrama_de_fases_da_gua.pdf
    • http://gozuketitara.onlinewebshop.net/bixami.pdf
    • http://jolagetota.epizy.com/aditya_369_ringtones_free.pdf
    • http://gajovab.epizy.com/kaggle_cats_and_dogs_dataset.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b1.bin
8ae7c5b679e170a48e436c4b73a336ace467a796ead6809b6502a545ca2def40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B1 5076 bytes
font_01_sfnt_off0000f6fe.bin
21de637edc987c4eb5523f6a7a77b6ac941e65ca28604f7afda3835c36a27ac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 11476 bytes

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