Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed27db9abb6b450…

MALICIOUS

PDF

74.2 KB Created: 2021-06-11 03:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 10b21bc2b41abc8ab405d0cc95c2e0f3 SHA-1: bde34e0ba1f6e355f909ddf5bc27677586f66726 SHA-256: 4ed27db9abb6b4502169d47ffcafa164fdc5b0be195d0741e7af72a9c86c5570
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/pbw?utm_term=activation+key+windows+10+pro+crack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418199/normal_60be3ef95e22d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480893/normal_606c3615cc7df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467581/normal_606028d740d76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471688/normal_604ca2acb8ab3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493221/normal_604a9f564218e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481397/normal_604e55d3208f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456376/normal_6026607827d0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_602f1c57364e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426071/normal_5fceafba37510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453560/normal_6007167b8c74b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_6026becde71f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/df730af1-1f49-4631-9707-3b60aac72bfd/28568588659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da41ded9-b250-4043-96f0-189df94f366e/baby_bullet_accessories_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdce77a4-ca28-4c51-b285-8b07320781b1/intermittent_fasting_diet_plan_16_8_for_vegetarians.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f58ea37-adcb-4699-9342-4b277db8b561/33663509330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0818393a-18b1-48f7-9316-f1c58fd8948c/ritukawokibazovefutut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f275e89-19de-45b6-bd8b-08cdaf62dcdb/8459440612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/550f3e5b-4884-4dbb-93f6-7e68c1b8d15c/juxukefu.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_off0000e0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CF 5536 bytes
SHA-256: a640747c2a1037e212295c620d8ce726387cfcd0478fe2be6f8992ecde207a6b
font_01_sfnt_off0000f3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DB 11760 bytes
SHA-256: c5805f5ec37deaa85937360e10c6ce082e200b78f3152f66de47818a39fd8788

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