Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fdd54d694cf9f34…

MALICIOUS

PDF

79.5 KB Created: 2021-03-18 16:17:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cb6e570cbaf5d9108a0235a2ce1ed521 SHA-1: 29d9fc099b230b41e95d953b3efeb4b051c74196 SHA-256: 4fdd54d694cf9f349114899dda0ea4d961c9b60a8bc3ccfb276bf8a952d592a6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, including one pointing to 'baarspo.ru', which is likely part of a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=brownie+painting+badge+requirements+online PDF link annotation
    • http://gixitetopes.scienceontheweb.net/how_many_spell_slots_does_a_level_7_warlock_have.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5fc652a335112.pdfIn PDF document text
    • http://bagodipab.22web.org/ap_reorganisation_act_2020_telugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_603620369541e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373519/normal_5fed3a510f393.pdfIn PDF document text
    • http://mokenolovulonom.medianewsonline.com/14117051397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423696/normal_60208dcdae70a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423430/normal_600ac86ae1218.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/block_scsi_vs_iscsi.pdfIn PDF document text
    • http://mimedilubaj.22web.org/faxafugufapofugitelavut.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/wemo_maker_alexa.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/how_to_adjust_noise_cancelling_on_beats_studio_3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mepefaru.epizy.com/multiplication_worksheets_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a785a7f4-d5d1-476e-89bc-cd15805bca04/bojolexijebofoguduv.pdfIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_c0d5dc0e2e2049ed95439ebf6aa61da5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47361a75-17dc-4a04-938c-ef5e7587978e/how_to_reprogram_prestige_car_alarm_remote.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/biroxek.pdfIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_1e6393f3f42f4555b35cf7786468def5.pdf?index=trueIn PDF document text
    • http://monulaw.epizy.com/biblia_de_estudio_palabra_clave.pdfIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_d5dc3d6bef9849d88fe6a31e0e3a85bf.pdf?index=trueIn PDF document text
    • http://sivopob.epizy.com/l_arabesque_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fcf65a0-3ccc-4d9e-afc4-5d1bd4d2a7ac/wepapowizot.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_off0000f690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 5684 bytes
SHA-256: 36f0ed159d59e5fef36854c17a2f878d794669f399b454068ab5ac19e40eb71f
font_01_sfnt_off000109d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D4 10672 bytes
SHA-256: e82d9d26bf4a1f2930f6d0ae66acedd23d1f9d239fbefeb227c16901552054dd

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