Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d06c162875bd59…

MALICIOUS

PDF

81.6 KB Created: 2021-03-14 20:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 315bf2143520d9760063ebc0f7ae8366 SHA-1: c42d897cbd32d5ecfc7dae2e1a7cb591d693c035 SHA-256: 07d06c162875bd5911636c19aed97496b7b744bcf04d160b4512a2742442a6ed
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://botokaw.ru/wix?keyword=ffxiv+marauder+warrior+guide PDF link annotation
    • http://look-hotel.com/are_hp_laptop_chargers_the_sameplfw4.pdfIn PDF document text
    • http://therarbooks.com/servidor_http_injectori7rvd.pdfIn PDF document text
    • http://milanomoda-italy.website/tennis_champs_returns_apk_3._0._4uer46.pdfIn PDF document text
    • http://triple-doska1.club/cognitive_bias_definition66un2.pdfIn PDF document text
    • http://tovarzone.ru/cisco_2960x-_24ts-_in_datasheetpwp1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87628bee-0e76-49af-99f9-7d8a0a28b68b/viper_3100v_alarm_manual.pdfIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_f03b91d8d939474a9d6777efe7a07a02.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a54318-2e7e-4829-a50a-def48e5146a9/puma_12v_air_compressor_review.pdfIn PDF document text
    • http://zenisuxu.rf.gd/paul_foster_case_book_of_tokens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4ba7484-5df8-43dc-82a9-8a3e454b3003/18530477986.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/group_therapy_confidentiality_agreement.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/expanded_anti_red_tape_act_2018.pdfIn PDF document text
    • http://zodumokosijupe.epizy.com/maxepavudukorokivokuvidu.pdfIn PDF document text
    • http://gikunipif.epizy.com/girl_guides_uniform_trinidad.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/agree_and_disagree_statements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fbe63ce-5470-4e4c-aa04-a6cf716c4735/how_to_lighten_up_a_grey_room.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42aff7d4-f4e3-4f00-891e-2d941d270a74/cursos_de_ingles_basico_en_linea_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0032ae96-eaf7-4587-9eca-8c1c6a11aff1/90925202057.pdfIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_688619ad2f9c400cb546bea5e591c7cf.pdf?index=trueIn PDF document text
    • http://kubazemaxem.epizy.com/83102894164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c4c193-a627-4e66-8b6a-a5dda1af0a42/how_long_to_cook_boneless_skinless_chicken_thighs_on_george_foreman_grill.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_off0001023b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023B 5192 bytes
SHA-256: 2317fc7676ef7daae6ba13ece914aa4ba22cb15e94074dbc1dd682fcd2724449
font_01_sfnt_off000113ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EF 10800 bytes
SHA-256: 472133afa4133bd9f001eda961710627f4de8240eb3ee4620aee8acdb417b300