Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd77d074e6fa91c…

MALICIOUS

PDF

76.5 KB Created: 2021-04-29 20:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 84bcfda1e76ae1a0eb9d089824a15590 SHA-1: 152f975a9892a2761d88798b872eb16112247dee SHA-256: 8dd77d074e6fa91c8ef6f02863cc854ae0a3e5704d1780c8ae8ffb4c65306ec5
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://maypoin.ru/strik?utm_term=what+does+gnosis+mean+in+hebrew PDF link annotation
    • http://cz-nitrof.website/libro_extraordinarias_mujeres_de_la_biblia_gratismxd8p.pdfIn PDF document text
    • http://pububasolemi.22web.org/13878693275.pdfIn PDF document text
    • http://save50it.pro/demutaruxhvlh.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/7223306218261ma0.pdfIn PDF document text
    • http://lijamerogavex.iblogger.org/voleke.pdfIn PDF document text
    • http://dontbeshy.xyz/pt_cruiser_transmission_mount_changeg3nd2.pdfIn PDF document text
    • http://milky-rp.space/avatar_comics_free_download5e24d.pdfIn PDF document text
    • http://podarokinsta.online/sadibudukadelolq4how.pdfIn PDF document text
    • http://lnstagram-support.live/overtime_request_form_ukdvd5z.pdfIn PDF document text
    • http://tvoyoproc.fun/32883863024ag0tk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://deed868a-3c3f-4b0d-b3ae-f9ebe8a38c33.filesusr.com/ugd/95283b_b5b46f26f87c4085a658884f786e9cf8.pdf?index=trueIn PDF document text
    • http://sodokeb.epizy.com/sistema_renina_angiotensina_fisiologia.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_7ad796f379f242b183e7e47cb69f1178.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_dce0a4b3c90647d38f0840301aba2376.pdf?index=trueIn PDF document text
    • http://sowinoto.epizy.com/84167675377.pdfIn PDF document text
    • http://rajunuximu.epizy.com/vutib.pdfIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_340824d8ef2f4c56a53258df780feaef.pdf?index=trueIn PDF document text
    • http://zepinurubav.epizy.com/62299509194.pdfIn PDF document text
    • http://vovugawe.rf.gd/que_relacion_hay_entre_educacion_fisica_deporte_y_recreacion.pdfIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_47a0e8ba6de5496abccef2624f43a65e.pdf?index=trueIn PDF document text
    • http://guniwazozosuriz.rf.gd/mupun.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_off0000ed86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED86 5452 bytes
SHA-256: 00eba492cbf5274c557bd8a9a236e798c3966154478d9eee77afe9284e4343bc
font_01_sfnt_off0000fff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF7 11072 bytes
SHA-256: 98d7b926d023f1ed1b44aa5cbb973940f87cd8a41d922d0ce19d12eda27e469a

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