Malicious PDF — malware analysis report

Static analysis result for SHA-256 b574159f23b90bf9…

MALICIOUS

PDF

73.2 KB Created: 2021-06-03 01:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 71800716b4e316bc6b97bf96b6ae2bb5 SHA-1: 56630f1e335a8a3d146d8c2371721721b2b0fa50 SHA-256: b574159f23b90bf9f4c4e3a2fbdb03217c2f71f4a480405b8fb8543bd73a0f12
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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://xajibur.ru/123?utm_term=robot+breakdance+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406516/normal_600be135e13ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_605c4c90e692f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_6068c5099177b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449622/normal_5feb683d73d82.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
    • https://uploads.strikinglycdn.com/files/0e76373d-8cb1-470b-95a0-b3b13a13d337/how_to_know_if_ds_lite_is_fully_charged.pdfIn PDF document text
    • http://vamafob.pbworks.com/f/descargar_tipo_de_letra_century_gothic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55775f4d-fa0f-4a28-aa79-88b3d0930da0/what_is_the_lowest_calorie_type_of_pasta.pdfIn PDF document text
    • http://savavaze.pbworks.com/w/file/fetch/144472062/pesejuviga.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/f/72095023261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e78b8af3-d6a2-4877-9c08-1563df985915/que_caracteristicas_tendria_un_gobierno_totalitario.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/f/harry_potter_lanetli_ouk_tiyatrosu_izle_trke_dublaj.pdfIn PDF document text
    • http://mibegenav.pbworks.com/w/file/fetch/144438687/gotifazaxirokibeteteti.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144427092/iobit_driver_booster_6.5_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0c1d15-8c3a-4146-90a4-1e5b10271fc2/mebixizapubitalefu.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/f/zapafejapexefeteso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4b2df1-6b3d-45bf-a501-dfd5373d6701/vigefijodefamebagekef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dba1a0c6-e13f-4a40-81d8-b0de26f93f8f/diablo_2_26_digit_cd_key_changer.pdfIn PDF document text
    • http://werinenimuta.pbworks.com/w/file/fetch/144529437/extempore_speech_topics_with_answers.pdfIn PDF document text
    • http://vananizi.pbworks.com/w/file/fetch/144529911/67737361217.pdfIn PDF document text
    • http://vamafob.pbworks.com/f/vufapuvopo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47A 5144 bytes
SHA-256: 9f4b410a916467b88a7cfd5e2e77543ae8a666b3b3f60c0bd0458a056146990c
font_01_sfnt_off0000e5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DD 10648 bytes
SHA-256: 9ad937c4b2e5e087457471f254faf1d6b233c63da890022642db7d3f635aca9c
font_02_sfnt_off000109bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.