Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0e6b46fe30c89a…

MALICIOUS

PDF

77.0 KB Created: 2021-03-29 04:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ccae0a5c2b6c14e739a8b61d45e1a745 SHA-1: d752aa80de272277d3ee3117da25e7d4b0bb826b SHA-256: 9b0e6b46fe30c89ac3367da495c1c7aacbebba0bc22f34c4a6c5329069e8cec7
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. The document body, though heavily obfuscated, contains references to 'Hill climb 2 mod apk' and 'wkhtmltopdf', suggesting a lure to a potentially malicious download site. The presence of external URIs and the overall structure indicate an attempt to redirect the user to a malicious host for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=hill+climb+2+mod+apk PDF link annotation
    • https://xajerunufunofe.weebly.com/uploads/1/3/1/3/131378991/9034972.pdfIn PDF document text
    • https://fodoradesak.weebly.com/uploads/1/3/1/4/131454556/998f4817b8a44a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391000/normal_5ff7b976d113c.pdfIn PDF document text
    • https://boripate.weebly.com/uploads/1/3/4/5/134590871/dugisokolewog_dexubakegozukiz.pdfIn PDF document text
    • http://purepivuposav.iblogger.org/pavezixudigetebuxitariri.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/ejea9Vx/race_start_time_today.pdfIn PDF document text
    • https://cdn.sqhk.co/mozopojugode/ajeKOih/94583856701.pdfIn PDF document text
    • https://razamilijukiw.weebly.com/uploads/1/3/4/8/134879964/jazogiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412896/normal_603e7ff147231.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/hax65gj/delegation_of_financial_power_rules_2006.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/ugjibQE/rozagiji.pdfIn PDF document text
    • https://cdn.sqhk.co/rejelozekazo/diaXDYL/kexabevodafeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1953b75-aaea-41b3-962d-1831528a33ba/bopadipudixusej.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/46405811722.pdfIn PDF document text
    • http://mosararivifu.rf.gd/98117561303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55548a57-2e0a-4d96-8a48-92814e4f35e1/66275931728.pdfIn PDF document text
    • http://vagakidid.epizy.com/alchimiste_paulo_coelho.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c1242bb-e5e2-446a-8371-d3ec09c12730/juegos_de_cine_cartoon_network.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/80733855272.pdfIn PDF document text
    • http://jepojofugag.rf.gd/mane_injury_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f4c6fc-62a7-4c39-b847-caa8fbe872a2/18210132334.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/78855236969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ce7e67-3630-4b5f-84cc-a0fd04ed10e7/66344347626.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/lusezajomijupi.pdfIn PDF document text
    • http://jogered.rf.gd/49260237610.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/dugokifapisewume.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_off0000f06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06C 5240 bytes
SHA-256: b842ccd4a251cdffec76ea294d2e40ff7f42c15f6ace69e7f22de5485838a304
font_01_sfnt_off00010226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10226 10616 bytes
SHA-256: 75129b69a107c01cb79df67b601525c2a834d704ec107d69452478a8f458cf50