Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eced8cb5e811381…

MALICIOUS

PDF

78.4 KB Created: 2021-03-29 01:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2f0d8489077bd4f3406ac1ef81102eef SHA-1: 8b63d53e233f89b14a8472db3a2b54a9af650e85 SHA-256: 0eced8cb5e81138160c75e4b4fecf490ef3265f55c4e8590647e5da15e95af2d
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 0.9998

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://vilenefex.ru/strik?utm_term=frankenstein+shelley+themes PDF link annotation
    • https://sagiwotagemo.weebly.com/uploads/1/3/1/8/131871993/fcd1073.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/rokomesurojudulafi.pdfIn PDF document text
    • http://mozaduz.mygamesonline.org/alzheimer_tratamento.pdfIn PDF document text
    • http://rimarilomikozu.medianewsonline.com/37516476306.pdfIn PDF document text
    • http://dududuw.mypressonline.com/12419757401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390052/normal_6003b5f99aa9a.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/what_time_is_too_early_for_dinner.pdfIn PDF document text
    • https://semetipakes.weebly.com/uploads/1/3/0/7/130775831/d22d6c13609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5fdc4dcd7eea7.pdfIn PDF document text
    • http://xevedudox.sportsontheweb.net/dieta_barf_per_cani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_60152f4a5857e.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/what_lights_should_be_on_my_router.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462992/normal_60328e097f249.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/wixatax/seniwipitosudupavu.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/90025582175.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/baofeng_uv-5r_charger_not_working.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/lazitojalovof.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/idsa_guidelines_hepatitis_c.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/runosedufesugisakewusu.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/brookstone_bluetooth_speaker_manual.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_off0000f6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D8 5048 bytes
SHA-256: ad233a793e55d6a4dff1d79ae827232c52dbe536bcb5e583582d517916705f0c
font_01_sfnt_off000107dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DD 10268 bytes
SHA-256: 3be039f4866d8ad5d125f8b3a28a4c7a48dc095d8b7f3777eeb508e34ec1eb37

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