Malicious PDF — malware analysis report

Static analysis result for SHA-256 9370369b2198bca6…

MALICIOUS

PDF

68.8 KB Created: 2021-05-22 03:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 62fe072b1606123be3efb6ddd18db749 SHA-1: a810ad78e4f18eb3d2ca30a2c11f4fc4ac589974 SHA-256: 9370369b2198bca62cf3aa627bf77c1d3761bcb847c7d106a59224498684ae51
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jottigo.ru/strik?utm_term=trifles+commonlit+assessment+answers PDF link annotation
    • https://rajepejejema.weebly.com/uploads/1/3/4/8/134860913/xebevovapitok.pdfIn PDF document text
    • https://bosebekepomij.weebly.com/uploads/1/3/4/8/134870535/gezisomiwaloz.pdfIn PDF document text
    • https://bazifimu.weebly.com/uploads/1/3/4/6/134661545/cfb116.pdfIn PDF document text
    • https://wadapunefivuda.weebly.com/uploads/1/3/4/3/134307948/xojizamixe-milegari.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/loxopudizus/zekexobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/997297f9-9b28-4071-977b-7621812d401c/stihl_ts400_spark_plug_cap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b608d3f7-1cfc-46fa-915a-3fba11cc5d7b/jugegijo.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/forukivilotokozopemezu.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/add_index_to_excel_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/fejojoxanukaweboveme.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/5.1_channel_home_theater_system_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5966cf45-bf70-4f92-9a85-1f2a5f9fa29b/80346977606.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/lafilaja.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/super_mario_odyssey_travelers_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/bubavuganap.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/83856751288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56731489-a5ab-4ada-9e6a-4e44f8b7acc5/what_brand_router_does_centurylink_use.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/is_the_wings_of_fire_show_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b6eedd-c83e-494e-b5b6-9cee88837257/kubota_l3010_hydraulic_fluid_change.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_off0000d0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BE 5068 bytes
SHA-256: fb6233bac00edb263220ac3a6223c4dd2ebc48f2568655148f9827d3c90b985c
font_01_sfnt_off0000e1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F3 10556 bytes
SHA-256: d24e2b0ebf7ce7d70170b2490d2afa19a532b3a57b248a95de3af7a9dff92501

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