Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c5d46132413e88…

MALICIOUS

PDF

76.2 KB Created: 2021-03-01 04:54:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2d38e1d0f217ee969b681cb82f7c4e91 SHA-1: 9da2d4e7396fa562b560e2c35ecafc271424b680 SHA-256: c1c5d46132413e8858b306e9c64b696ef600d618bc9015f5471a4e3e99dda1ec
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services, indicating a link farm or phishing attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/wix?keyword=how+to+wire+a+pool+pump+timer PDF link annotation
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/3130673.pdfIn PDF document text
    • http://ebay-coupon.ru/aarons_platform_beds8cfy1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488322/normal_5fc88389cfd3a.pdfIn PDF document text
    • https://komovifewujip.weebly.com/uploads/1/3/4/8/134895136/bunoxemuk.pdfIn PDF document text
    • https://mejotowud.weebly.com/uploads/1/3/0/9/130969644/81a03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447874/normal_5fd937b0da740.pdfIn PDF document text
    • http://kolamudeluxom.iblogger.org/macbeth_act_2_translation.pdfIn PDF document text
    • http://tolosoludoxol.22web.org/bleach_vs_naruto_2._6_android.pdfIn PDF document text
    • https://pobejatu.weebly.com/uploads/1/3/2/7/132741278/vikagozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420019/normal_5fe9afebd5c0d.pdfIn PDF document text
    • https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/7826527.pdfIn PDF document text
    • http://naturapple.space/528523125665dm4y.pdfIn PDF document text
    • http://usmileofficial.site/asus_p5n32-e_sli_bios_updatee91jg.pdfIn PDF document text
    • http://vengriya.space/77099522549i1qzq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473919/normal_5ffdbf6699eb6.pdfIn PDF document text
    • http://tefulen.iblogger.org/axios_post_data_x-_www-_form-_urlencoded.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pegozegi/cryptic_crossword_answers_dan_word.pdfIn PDF document text
    • http://gamutazuzores.epizy.com/adobe_photoshop_7._0_laptop_software.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/didamux.pdfIn PDF document text
    • http://bufalirafuma.epizy.com/gofiso.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/93178405955.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/laboratory_audit_report_template.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_off0000ee50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 4840 bytes
SHA-256: 0590335812a18c0beebb9c56f67afd5a39051167a6b2788a97d5391c12f3629a
font_01_sfnt_off0000febf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBF 10780 bytes
SHA-256: 59e8695c6a9ed6782bb0ae195426b794623b55b6b4c88f5ce595810bd4a9ebcc

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