Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17c11ca442b7e55…

MALICIOUS

PDF

79.4 KB Created: 2021-04-23 20:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54c6af1ae922636bb5d826b80cdf138b SHA-1: de4826ff22af3f28dd4ded8ddcda41e1840b4c6e SHA-256: a17c11ca442b7e5523b61ea32cb4084ec27ebab501bd12126f0cbb6f87a49e6e
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs, one of which is presented as a search result for technical information, likely to trick the user into clicking it. The PDF also contains obfuscated content and structural anomalies, suggesting an attempt to conceal malicious activity. No scripts were extracted, but the presence of numerous external links indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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+many+quarts+of+oil+does+a+ford+6.0+diesel+take
    • https://futuratolofuzup.weebly.com/uploads/1/3/5/3/135399438/vexad.pdf
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/f19e37bb1.pdf
    • http://216tilford.com/dr_axe_candida_dietz2ttn.pdf
    • http://fezibinuzot.iblogger.org/performance_status_report.pdf
    • http://muzusebab.22web.org/statistical_methods_for_spatial_data_analysis_schabenberger.pdf
    • https://cdn.sqhk.co/vapelomusanu/Mhfjigc/download_idle_space_clicker_mod_apk.pdf
    • http://whowill.ru/30486125885p2575.pdf
    • https://zutijuxugovoxi.weebly.com/uploads/1/3/4/6/134684331/lezidem.pdf
    • https://cdn.sqhk.co/kapapomabu/qicifij/zombie_city_survival_mod_apk_1._9_download.pdf
    • https://gibexiwufanoti.weebly.com/uploads/1/3/6/0/136099712/xogideda-vosimu.pdf
    • http://ital-girl.space/magic_coloring_coloring_pages_color_by_number_worksheetsfjcqz.pdf
    • https://vunakeba.weebly.com/uploads/1/3/4/6/134623580/95477a1f2.pdf
    • https://cdn.sqhk.co/lepavenujal/Gi8fFgj/sitasi.pdf
    • http://arendaavto.taxi/drying_methods_of_food_preservation62q8k.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/530b1d9f-36c1-44fb-abdc-249f79d21c76/goliath_5e_wikidot.pdf
    • https://s3.amazonaws.com/dazinibonofobi/wikoposew.pdf
    • http://jarogatugufepew.rf.gd/costing_clerk_job_description.pdf
    • https://s3.amazonaws.com/sitozi/ubuntu_14._04_lts_64_bit_free.pdf
    • http://fefemegazo.rf.gd/anisio_teixeira_livros.pdf
    • https://uploads.strikinglycdn.com/files/67201dfd-1c95-4efa-8639-43b6d293c790/how_to_turn_on_voicemail_on_panasonic_home_phone.pdf
    • https://s3.amazonaws.com/bejexe/82683861200.pdf
    • https://uploads.strikinglycdn.com/files/00450c68-8b8d-45b3-8228-f684a9c74ed4/netgear_n600_modem_router_model_c3700.pdf
    • https://uploads.strikinglycdn.com/files/f630ea2f-0b88-4f2f-9f7b-90684c8d0915/69920765614.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_off0000f80d.bin
ccf6554876277dbf57fee90b15ab386b6467f4d2263f1694b56ec032153d1379		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF80D 5728 bytes
font_01_sfnt_off00010b8a.bin
17801d3eac30fc8acb9388b1dcc5d0040788d9afa2391dba4219e8813f45d8d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8A 10852 bytes

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