Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f9215cfd55807e…

MALICIOUS

PDF

78.8 KB Created: 2021-03-12 07:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ed5decd095a3fcfdad4e85ad02fe736d SHA-1: 2b6490c4161f6123340f873449a8fb70a4ad0710 SHA-256: b5f9215cfd55807eb05de3441d7bba8dcf500fec911498a41e035967cb1e44cf
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for an external URI pointing to a website promising a "board kings hack". Additionally, a large number of external PDF links were detected, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/wix?keyword=board+kings+hack PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456985/normal_600488fea1540.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425237/normal_5fffa6f3cdd92.pdfIn PDF document text
    • https://cdn.sqhk.co/febenapox/Ujegijc/codigo_procesal_penal_de_guatemala_actualizado_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vudasobije/gqiaw5l/strawberry_dna_extraction_pre_lab_questions_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367964/normal_5feb7eec26bd2.pdfIn PDF document text
    • https://cdn.sqhk.co/wanadujogo/eK4G4jh/mosquito_helicopter_2_seater_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/gdVhdjb/dragon_gourmet_alam_damai.pdfIn PDF document text
    • https://cdn.sqhk.co/kapimetavis/gejcCjj/75349990857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450140/normal_6046575645d44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446400/normal_601aaa9c937e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489428/normal_6012787f1f7fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446260/normal_60008d1b1579f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421623/normal_5fde9db4b39df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447630/normal_604034f59927d.pdfIn PDF document text
    • https://cdn.sqhk.co/katafojedul/gieggk6/bujuzefajoxukulejopa.pdfIn PDF document text
    • https://cdn.sqhk.co/visobipibe/iGKijIa/printable_basketball_shot_chart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458421/normal_5fe8557e2e7c7.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/mjeieij/82888518166.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_d4b4b3bde2af4d11ad04c195c9b91936.pdf?index=trueIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_ee701bb118ea4b1d9bc33edbda540465.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3ED 5284 bytes
SHA-256: ce2f4b8ed5fe0975776ab8ac26c1b0370b5ee668d8f47787b54232ebcf2449f0
font_01_sfnt_off0000f5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E5 10348 bytes
SHA-256: 42c8f0f4e249544805dd3ac22354fc4b1311328a763feb46fbcd66de34bcb745
font_02_sfnt_off00011993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11993 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940

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