Malicious PDF — malware analysis report

Static analysis result for SHA-256 34246a680c83dbc2…

MALICIOUS

PDF

78.2 KB Created: 2021-04-05 06:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0a78a8ed8284bb54e88d688a9730f283 SHA-1: 9606a1cc7074c9831d47eafad2eff59b482deb57 SHA-256: 34246a680c83dbc2f8fe7096f6e3fad37136f9ee7ae70e0ecd9148f07a5dc062
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a significant heuristic identifying it as a link farm on disposable hosting, suggesting an attempt to redirect users to potentially harmful sites. The presence of external URIs and the overall structure point towards a malicious intent to exploit user trust or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/123?utm_term=main+bhi+badhiya+song++mr+jatt PDF link annotation
    • http://fapseo.ru/jinuguvifan2fp0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449004/normal_5fd949fba05c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481834/normal_60045ff49c704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459926/normal_600200df8c171.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/banuxijawamovawamevoxegi.pdfIn PDF document text
    • http://ridunculus.com/9432179045cw6fp.pdfIn PDF document text
    • http://nunobuzipame.medianewsonline.com/document_to_converter_setup_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444117/normal_600ecdf316f90.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/chevrolet_spark_2015_manualogmva.pdfIn PDF document text
    • http://wordwild-store.com/xojepudafebuzonaf6ynm.pdfIn PDF document text
    • http://hangookoil.ru/4472112406xbm5f.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/jabam-fisesominote-risobuz.pdfIn PDF document text
    • https://dawipufa.weebly.com/uploads/1/3/3/9/133986453/89446caa.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/rujonopidizudovelajefam94pz7.pdfIn PDF document text
    • http://daliadiago.com/maraxakalexosaknwjfu.pdfIn PDF document text
    • http://bejawutipage.mywebcommunity.org/how_much_does_khan_academy_sat_prep_cost.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
    • http://kaloruligot.onlinewebshop.net/best_self_care_gifts_2018.pdfIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_fcf6da5b73884a99a61c299b8167ea1d.pdf?index=trueIn PDF document text
    • https://921790ca-7b53-43bd-a25d-275d6f056404.filesusr.com/ugd/9d24cb_9c7a0c2d17574ad893f944383d8a0c65.pdf?index=trueIn 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_off0000e591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 5200 bytes
SHA-256: 5e7a4d56430d2aa528733adf7cc0e43289fec2cf5d6e618d29fdfcf7ba10003b
font_01_sfnt_off0000f70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70F 10856 bytes
SHA-256: 3733dfc554077a1f612353544d9404be5530c793eed86690afb4aa654b0c9e3c
font_02_sfnt_off00011c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C10 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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