Malicious PDF — malware analysis report

Static analysis result for SHA-256 815dec792bee2e7c…

MALICIOUS

PDF

75.3 KB Created: 2021-06-06 17:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0d3bd9c2002054f7e60f22cfb59006e2 SHA-1: 4b03a2fce5d1aa39e9ac457caff33bdba8ab0d69 SHA-256: 815dec792bee2e7c1e089fa5496eb3a6ea2d15a50450ec06db86e71e8f1c2789
126 Risk Score

Malware Insights

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

The PDF document contains a lure related to "8 ball pool hack online" and embeds multiple URLs, one of which is a known malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site.

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://synerhu.ru/pbw?utm_term=8+ball+pool+hack+online+-+how+to+get+unlimited+cash+and+coins PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4368237/normal_60b21244ba2c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406228/normal_5fc758509ecda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426410/normal_603c856ac2118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415767/normal_6015ee4172086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484126/normal_60b80df1a0244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_603ba19d58973.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416656/normal_5ff4a31fcb20e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_6032f34c7b332.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jetipufagi.pbworks.com/w/file/fetch/144675222/mapenara.pdfIn PDF document text
    • http://fufitiruw.pbworks.com/f/gumowafujugudasolapu.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/f/how_stella_got_her_groove_back_book_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae6f3e2-b0fd-45e5-855b-515e5cf9c3d5/activation_key_for_easeus_data_recovery_wizard_12.9.1.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/f/laxmikant_polity_revision_notes.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/w/file/fetch/144606036/2014_harley_48_owners_manual.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144425469/mejotuzebobepoxonibuluno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24fe0bad-e653-4619-bb76-7388d4ce84c2/tabla_de_densidades_de_solidos_en_kg_m3.pdfIn PDF document text
    • http://gapufipi.pbworks.com/w/file/fetch/144543627/fobixi.pdfIn PDF document text
    • http://moxulolo.pbworks.com/f/guion_teatral_de_los_tres_cerditos_y_el_lobo_feroz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecae3754-75be-45d9-8338-80d3084e4f8d/my_passport_ultra_for_mac_2tb.pdfIn PDF document text
    • http://faxamom.pbworks.com/f/76908060681.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/how_many_calories_does_a_victorias_secret_model_eat_per_day.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/w/file/fetch/144422676/6244586508.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_off0000e67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67C 5816 bytes
SHA-256: 162dd3d5f0693702e2b2277177b247b0830e45db4f201fb8fe99e302e926ec87
font_01_sfnt_off0000fa38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA38 10900 bytes
SHA-256: f96aa3b4d845987dd3c36d936bfa9148c01d51304ace772c25d41ab4d5350562

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