Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f8501ee1a7a45a…

MALICIOUS

PDF

85.4 KB Created: 2021-03-31 12:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9c274365e604ea521623d8b474d6f35a SHA-1: 5312e34ceddb1c42d0af101748952bbc209eeb4a SHA-256: 70f8501ee1a7a45aeac67295ba639237911806bff3f2c8d244e3d8586869d25d
126 Risk Score

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 0.9995

Heuristics 5

  • 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 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://druttle.ru/123?utm_term=kansas+nebraska+act+map+activity+answers PDF link annotation
    • http://milanbeach.fun/2003_ford_focus_zx5_batteryxdu4d.pdfIn PDF document text
    • http://buxeletifexid.medianewsonline.com/nigefuxofiramavuwiruriwe.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/confidence_fitness_treadmill_reviews1avup.pdfIn PDF document text
    • http://zarabatyivat.ru/2929958706kuguq.pdfIn PDF document text
    • http://ses-paypal.com/fishery_business_plan4uk6a.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/administrao_estratgica_ireland.pdfIn PDF document text
    • http://bejawutipage.mywebcommunity.org/zolinesege.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/40th_bcs_preliminary_result_2020_download.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/82402572377.pdfIn PDF document text
    • http://duplicwcnj.space/89851719244gedsl.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
    • http://pazatirademe.rf.gd/1140872181.pdfIn PDF document text
    • http://nodikaduf.onlinewebshop.net/risk_management_in_healthcare_institutions.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/82163782001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa9db21-d21f-4e51-aa4c-2fb60cd3df9b/95025845235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/564efa37-60b8-482a-a57b-4c09518dddbe/imagery_in_romeo_and_juliet_act_3_scene_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0774eb29-0905-4f66-a93c-fc387a88af22/porque_sale_linea_alba_durante_embarazo.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/diaguitas_calchaquies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6ad4a4-8690-4df7-908d-19570360bb93/where_are_the_filters_on_my_dyson_animal.pdfIn PDF document text
    • http://desigaweru.myartsonline.com/kapiv.pdfIn PDF document text
    • http://fosatuzosi.epizy.com/price_control_and_anti_profiteering_act_2020_malaysia.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/types_of_altars_in_the_bible.pdfIn PDF document text
    • http://nojuvuxu.rf.gd/76602822761.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_off00010224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10224 5152 bytes
SHA-256: d1699a02215f8a1ccabc334bc6b52994a70fdb7d227999ea521be80aa72d6f0b
font_01_sfnt_off0001139e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139E 11624 bytes
SHA-256: dcba2eb3fa4e71f8271c72559e69a88f06b56e2380e06bb480601b107d308b51
font_02_sfnt_off00013a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A37 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2