Malicious PDF — malware analysis report

Static analysis result for SHA-256 217bc8818e879bc9…

MALICIOUS

PDF

90.0 KB Created: 2021-06-08 08:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 222a3b8eccd0feab8c12f28db8e2b601 SHA-1: 519bac604edbb818157c92223763b735337f36a5 SHA-256: 217bc8818e879bc979960907ad1bdc8089ce1137d1862d4e81c27a197c800cbd
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-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://chcial.ru/pbw?utm_term=fox+sports+go+not+working+with+directv PDF link annotation
    • https://viwejabaru.weebly.com/uploads/1/3/4/7/134749074/nubiledodusidava.pdfIn PDF document text
    • https://gulemexaw.weebly.com/uploads/1/3/4/3/134360266/gozakix_gatoxitozefux_benepupudotu.pdfIn PDF document text
    • https://jesuzexujugom.weebly.com/uploads/1/3/0/7/130776612/boguz.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/zorebiwubejito.pdfIn PDF document text
    • https://xafafiseroferop.weebly.com/uploads/1/3/4/5/134525648/xitiwuluwe_dunosoz_buwopa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144424656/o_que_so_inibidores_enzimticos_quais_os_tipos_de_inibio.pdfIn PDF document text
    • http://suxogovexig.pbworks.com/w/file/fetch/144788799/is_cbt_effective_for_adhd.pdfIn PDF document text
    • http://vikowezanipe.pbworks.com/f/jiveworonesijuxidirivevik.pdfIn PDF document text
    • http://zuxanuj.pbworks.com/w/file/fetch/144790611/54384543987.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/w/file/fetch/144573156/history_of_the_toyota_production_system_tps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9feaf60f-364b-4e19-9fc1-1c7672e5fd6f/wemulobi.pdfIn PDF document text
    • http://piwomimagito.pbworks.com/w/file/fetch/144842241/service_report_form_sample.pdfIn PDF document text
    • http://gaxoxim.pbworks.com/w/file/fetch/144772629/monesovuxaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d339656-421d-4dcb-9cb6-d3f9e7d87ac9/how_to_sketch_a_portrait_for_beginners.pdfIn PDF document text
    • http://zapibibilubo.pbworks.com/w/file/fetch/144721812/lakshmi_stotram_in_kannada.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/f/fofanuxulufemafu.pdfIn PDF document text
    • http://zuwofig.pbworks.com/w/file/fetch/144548052/zirusugemubego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6434c0d5-cf14-4957-a96a-7761fc6711a3/how_to_catch_a_blooper_links_awakening.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/f/89542402037.pdfIn PDF document text
    • http://xawaren.pbworks.com/f/movepi.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_off00011e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5B 5332 bytes
SHA-256: 6e395c2aae9cfce1d93322ba50b5405f6c9929d2c721956cc8378c6eabb8a224
font_01_sfnt_off0001309f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309F 12704 bytes
SHA-256: 66035d9ead1d3fcc9f432def8e9386d207917f5cab15bdf6f3438282512b0548

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