Malicious PDF — malware analysis report

Static analysis result for SHA-256 07cf739fc1ee8c5c…

MALICIOUS

PDF

75.1 KB Created: 2021-02-15 01:47:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0993ec8d12643f5c0eba4fe40ecab0f3 SHA-1: d01752e6763359629215861b85fab86bd8c7a2b2 SHA-256: 07cf739fc1ee8c5cffe88ecfa74eb02f1e72aa4713072b13e0a29cb3dd8b311b
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector at 'https://yafferge.ru/wb?keyword=endeavor%20energy%20annual%20report'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to manipulate search results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/wb?keyword=endeavor%20energy%20annual%20report In PDF document text
    • https://vaxinukosiju.weebly.com/uploads/1/3/4/6/134625250/0f6cee50544.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/rciiXii/battle_chasers_nightwar_2_switch_price.pdfIn PDF document text
    • http://losqutoq.online/introduccion_a_la_psicologia_millerda6f2.pdfIn PDF document text
    • https://cdn.sqhk.co/purizepore/sxggugd/weather_forecast_new_york_city_january_2020.pdfIn PDF document text
    • http://tomandbxof.site/oracle_sql_database_10g2ka1v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471234/normal_6014cef4103cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497109/normal_5fe8bf7fed3d2.pdfIn PDF document text
    • http://sentytld.online/84084381722td79m.pdfIn PDF document text
    • http://pelistens.xyz/zombie_gunship_survival_hack_no_verification5xfw2.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/108icjj/pududodi.pdfIn PDF document text
    • https://sobomevoza.weebly.com/uploads/1/3/0/7/130739746/nozodixijakeg.pdfIn PDF document text
    • https://cdn.sqhk.co/lidumezuvir/nhcFgfl/fruit_king_corpus_christi_tx_hours.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wozowuledij/australian_skilled_occupation_list_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/dad_calling_you_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/libro_epidemiologia_basica_bonita.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/anime_vr_games_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/9930914476.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/best_keylogger_app_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/comcast_tv_guide_pennsylvania.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC90 4904 bytes
SHA-256: cb3a8142e5aa0b012e823c067b6b4f86e452255b5915d3df3dcdf5a2d609e1a5
font_01_sfnt_off0000ed57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED57 10552 bytes
SHA-256: 99a867637aac77c6bd75fc4e85268d670246779bb65f3966887650b82600fe17
font_02_sfnt_off0001115f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115F 4324 bytes
SHA-256: 781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60

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