Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05c955595cf44be…

MALICIOUS

PDF

90.2 KB Created: 2021-06-04 03:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8387f14a4d062008f114234f2c0e1be6 SHA-1: 12f1e808f2030b8e7a990a39b4d0b0cc974f0b8e SHA-256: a05c955595cf44be0badacdcf39ba2783bf726b5467a756338a5e10a3bc0b403
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with a primary focus on 'philabc.ru', suggesting a phishing or scam attempt. Heuristics indicate the PDF is a link farm hosted on disposable infrastructure, designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to exploit vulnerabilities or lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/pbw?utm_term=pes+2020+mobile+controller+support+ios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411919/normal_601d2a6b9d49c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450884/normal_5ffef8b099af6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_6066ed0b0a88f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446280/normal_600c6aa7c1752.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4374951/normal_60b06e0297372.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464720/normal_5fe2af1c8d799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458840/normal_6058090f16efc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371536/normal_600e21965cb42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413986/normal_5fe9f12dc27fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449774/normal_60515f8180f25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475719/normal_604339de8c7df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuranosa.pbworks.com/w/file/fetch/144414786/cre_notes_form_4.pdfIn PDF document text
    • http://felefejimax.pbworks.com/w/file/fetch/144581355/vodut.pdfIn PDF document text
    • http://botinuba.pbworks.com/w/file/fetch/144414291/g_shock_g7900a_manual.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/tubemate_apk_download_new_version_2020.pdfIn PDF document text
    • http://risuxujuvu.pbworks.com/w/file/fetch/144517665/56687228134.pdfIn PDF document text
    • http://labidan.pbworks.com/w/file/fetch/144468564/el_viaje_del_heroe_campbell.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/w/file/fetch/144498297/call_of_duty_mobile_garena_apk_obb_file_download.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144427851/fanuc_series_ot_parameter_manual_download.pdfIn PDF document text
    • http://pibadaro.pbworks.com/w/file/fetch/144582765/tusoligezufipokanugepur.pdfIn PDF document text
    • http://xiwitanul.pbworks.com/w/file/fetch/144560229/xozepo.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/f/22610327837.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB7 5284 bytes
SHA-256: cba295f503eaa78e2a50581520bd36f076f8eb4fd7d08c7db08ad6fcb41da4a0
font_01_sfnt_off00012f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F96 14940 bytes
SHA-256: 72c69351e4add52b1d92185f91598c98da63dadea20a417792cf5dfa562edf07

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