Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ef5a4abbd80f10…

MALICIOUS

PDF

80.9 KB Created: 2021-03-16 22:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ca999d4e95704e0b75ffa47b451cd52 SHA-1: 1ecef7ad1faadc5373e60a774b5729ed86effa65 SHA-256: a0ef5a4abbd80f10e4f633a2d037831c76fb4b587eee23adef0550de3f5659ce
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a phishing site, disguised as a study guide. The PDF structure and embedded content suggest it's designed to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=how+to+study+the+bible+more+effectively
    • http://nifibegiro.iblogger.org/webmusic_new_baul_song.pdf
    • http://babysampler.com/delta_single_handle_shower_faucet_repair_instructionswcomg.pdf
    • http://bifugejif.22web.org/arma_3_server_files.pdf
    • http://stavki.link/zubibadisafibapokafozono8ct14.pdf
    • http://milanomoda-italy.website/pezixezimisizs41p6.pdf
    • http://eagleaff.com/stock_market_crash_definition_historyaofiy.pdf
    • http://mishgen.com/gigotivunemojh1yz.pdf
    • http://good-production9.site/rhythm_exercises_guitar18fr0.pdf
    • http://get3creditscores.info/415551754601h5du.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/polexebuj/biwegidomumi.pdf
    • https://s3.amazonaws.com/regovadeje/95463982155.pdf
    • http://pamubaj.epizy.com/chegg_solutions.pdf
    • https://s3.amazonaws.com/vavejijitatofu/goalkeeper_gloves_size_guide_uk.pdf
    • https://uploads.strikinglycdn.com/files/56ae5fc3-a906-4ad4-b076-0ded670acb75/cyberpunk_2077_gameplay_october_2020.pdf
    • https://s3.amazonaws.com/gewuwasi/gakawejiranufalulabo.pdf
    • https://uploads.strikinglycdn.com/files/1152a42b-e8c2-4d3c-808a-c67780e56d17/ge_microwave_oven_customer_service.pdf
    • https://s3.amazonaws.com/nafoxuda/xorizopugozemezuzef.pdf
    • https://uploads.strikinglycdn.com/files/f2911163-a3b8-4111-9eba-e54045b6e303/koropeg.pdf
    • https://s3.amazonaws.com/xugigabitulu/buker_ba_pashe_full_audio_song.pdf
    • https://s3.amazonaws.com/fedojigudaj/small_painting_ideas_aesthetic.pdf
    • http://jonemif.epizy.com/tuning_ukulele_senar_4_apk.pdf
    • http://xerezaki.epizy.com/capites_de_areia_livro.pdf
    • https://uploads.strikinglycdn.com/files/096cefc1-838f-4dd1-89a8-f4ad50e755ca/why_is_apc_backup_battery_beeping.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_off0000fe04.bin
a3f00fc58dc4ef101e4142b19e708fdb46a99fcd11e7db26073c8df48917c5b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE04 5408 bytes
font_01_sfnt_off00011058.bin
7141120078a1f916120f06ed10d1ce950968a998501dd88bb7b1e563217beaa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11058 11028 bytes