Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f9b9e229b5f1eb…

MALICIOUS

PDF

78.2 KB Created: 2021-03-19 22:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 487bd7e848d0cd0c4fa8f88365fffd52 SHA-1: 50bdf1eeea8a8163b1f8f607ebf160208a4cf00d SHA-256: b7f9b9e229b5f1eb43ded7098a3ef56b386f338b35d456cdd238d70332624d00
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to a malicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to facilitate initial access, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=waves+and+tsunami+brainpop+answers
    • http://erogan-columbia.site/vulubukovujepomisebajugom4ss3d.pdf
    • https://tamidotojo.weebly.com/uploads/1/3/1/8/131858916/c8fec9a0.pdf
    • https://cdn.sqhk.co/kupujape/jhjgeC0/2465493598.pdf
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/422866.pdf
    • http://vashastrahovka24.ru/how_to_export_strava_route_to_garminv00iw.pdf
    • http://lovelyhouse.online/thomas_bulkowski_candlestick_pattern3v1bh.pdf
    • http://megatorg.ru/does_alec_die_in_city_of_heavenly_fire4mzyc.pdf
    • https://nozipukox.weebly.com/uploads/1/3/6/0/136057246/lisad.pdf
    • https://kunepupavebi.weebly.com/uploads/1/3/4/0/134095879/5608918.pdf
    • https://cdn.sqhk.co/xederebat/gf3je4s/jeux_zumble_classic.pdf
    • http://lnstagramcopyrightcenter.com/lycoming_o-320_b2b_parts_manualc0w1c.pdf
    • https://kefawefixak.weebly.com/uploads/1/3/0/7/130738991/c10d57e3dda.pdf
    • http://lovechat24.club/696751807107rgcy.pdf
    • http://idealica-italiaufficiale.website/7737106406ate8p.pdf
    • https://cdn.sqhk.co/gixejefi/hgfjeYh/biguxoropofevugiwo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wujapu/esri_story_map_templates.pdf
    • https://s3.amazonaws.com/rilexazejuzovep/5889127159.pdf
    • https://uploads.strikinglycdn.com/files/177569c3-a59d-4e8b-a7d1-e6817d3ec75a/why_isnt_my_furnace_shutting_off.pdf
    • https://s3.amazonaws.com/pidufozu/gel_electrophoresis_lab_report.pdf
    • https://s3.amazonaws.com/gixawetopoli/23325532594.pdf
    • https://s3.amazonaws.com/ravuxudibure/dead_by_daylight_free.pdf
    • https://uploads.strikinglycdn.com/files/edbd2464-618c-4f18-b316-ca86ebead1cc/how_to_install_a_reliabilt_sliding_door.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_off0000f3cd.bin
364f1c42e7096341b45fba150ceffc6535772b19308b6e83ecd49e4ebb41ec82
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CD 5376 bytes
font_01_sfnt_off0001060b.bin
f19942e236a23c377f0ae6b39bce694a51a6f8febcfa346d0019e751121db070
pdf-font-stream PDF embedded font (sfnt) at offset 0x1060B 10864 bytes