Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89da3aea6863229…

MALICIOUS

PDF

72.3 KB Created: 2021-03-12 06:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b7f9ec9366c251432e111a1eb82fd8f SHA-1: a90d0989b44c8b64d7216d565beb91f241e348a1 SHA-256: a89da3aea6863229acedc6f6a1f8788f5060408690f503b8b95c53c7a0c1f849
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains an embedded URI pointing to 'https://midufefew.ru/wix?keyword=sas+4+apk+ios', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct textual lure is discernible.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/wix?keyword=sas+4+apk+ios
    • https://cdn.sqhk.co/nukasiwesex/4ghigih/mental_retardation_2016.pdf
    • http://repaircreditscore.info/35432682015v0fvu.pdf
    • https://cdn.sqhk.co/rapovixovuti/AmeicNV/angry_birds_friends_game_download_apk.pdf
    • https://cdn.sqhk.co/nefikelifu/3fhdrjc/cordial_glasses_with_stem.pdf
    • https://cdn.sqhk.co/webunojixisa/aKEnX7P/vinoxo.pdf
    • http://lidlid.xyz/54516716854qs5g3.pdf
    • http://plafond.xyz/mowir74n79.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kavobomuvaweg.epizy.com/vitali_chaconne_in_g_minor_sheet_music.pdf
    • http://volabugogati.rf.gd/16962114960.pdf
    • http://womogesupepup.epizy.com/2018_chevrolet_spark_ls_manual.pdf
    • https://s3.amazonaws.com/kaxukok/bhakta_prahlada_movie_free.pdf
    • https://s3.amazonaws.com/rebomedug/jixateboguja.pdf
    • https://s3.amazonaws.com/sorapobuk/47609491557.pdf
    • https://s3.amazonaws.com/xozeb/band_baja_best_ringtone.pdf
    • https://s3.amazonaws.com/makumapikeze/wekaguwipolez.pdf
    • https://s3.amazonaws.com/figugipopar/migojerot.pdf
    • https://s3.amazonaws.com/dudigonifu/xupewokulisog.pdf
    • https://s3.amazonaws.com/niporofez/aaruthra_tamil_movie_songs.pdf
    • https://s3.amazonaws.com/lekezaru/free_4k_anamorphic_lens_flares.pdf
    • http://lawakeweba.epizy.com/grade_12_english_literature_study_guide.pdf
    • https://s3.amazonaws.com/wujodibu/bafezudinudikut.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_off0000dcd2.bin
bb4e6f5c9f182d7db304ac122da84fff4be90f8444fe21b3024693a410b963c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 4940 bytes
font_01_sfnt_off0000edbc.bin
f00ad02fac07df2c9a76e736b19a48f2e61cef4fd5dabb00c5f19ec9b8d643bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 12180 bytes