Malicious PDF — malware analysis report

Static analysis result for SHA-256 447b30404e5f9d64…

MALICIOUS

PDF

71.7 KB Created: 2020-11-28 21:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c34488243e7020b3e7f8ca55a92a6c89 SHA-1: b7fb9c1e4b06300d7208251612eb3aaa4256fbbd SHA-256: 447b30404e5f9d648c24f1f4c1a7c1dffd67973c179df38da05012cff82f13df
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF identified as malicious by ClamAV and an ML classifier. Heuristics indicate it contains a mass external PDF link farm and is designed as an advance-fee scam lure, presenting lottery or prize language with parcel delivery requirements. The embedded URL 'https://traffset.ru/aws?utm_term=best+white+noise+app+android' likely serves as a redirection point for the scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://traffset.ru/aws?utm_term=best+white+noise+app+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389107/normal_5f8e849573ed8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5f9195e8720c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463306/normal_5fb58cd0222b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f8c429a14a9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_5f9fb288148be.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/3c840056.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/lorifumofelu/adding_and_subtracting_decimals_worksheets_year_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09466d27-c2d7-47e1-8f59-595cc24fa515/an_eye_for_an_eye_witcher_3.pdfIn PDF document text
    • https://s3.amazonaws.com/kamigovitakiril/gilesewugiminumikol.pdfIn PDF document text
    • https://s3.amazonaws.com/derefe/nerisaxalefumel.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/motorised_valve_actuator.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/arraylist_remove_element_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62a9ca8-edbd-4cb5-b1bc-628ee49144f0/gakokale.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_off0000dcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD9 5156 bytes
SHA-256: 8beb623e4673f6c518e7b1fdb101ed8197c9e688aeb36929d76fa07ac89b70a4
font_01_sfnt_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 10536 bytes
SHA-256: 09315786ebf6a0c976a3fef796f70c080eacb69e8cd116deec8e6729f7733ac6

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