Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61ce14f91408c1a…

MALICIOUS

PDF

67.4 KB Created: 2020-11-28 08:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7511249cafb568b77355731737e0f8ea SHA-1: b93aa2087155f5ea8ad4b2c3853ee23557d9ff8e SHA-256: b61ce14f91408c1a7454fafe01702996c38dc40bf9d017c1253b4e565b813ae8
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is identified as malicious by a ML classifier and ClamAV, with heuristics indicating it impersonates a cloud document lure. An embedded URL, https://traffking.ru/aws?utm_term=app+share++free, is present and likely serves as the malicious payload delivery mechanism. No scripts were extracted, but the PDF structure and heuristics suggest a phishing or malware distribution attempt.

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
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://traffking.ru/aws?utm_term=app+share++free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f86f59b30c8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5fbfb87dd5b4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_5f9ceefce9989.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/gitipelut/gigumesivogazu.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/xewovinepa.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/showbox_apk_update_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ce2785-34ca-4d99-a7b5-8556ab0baa67/edzie_varskvlavi_sheni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a7ae16-8737-4f3a-a8f3-54a0013a51f1/estimated_prophet_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/pijureruzivetedano.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/buy_dress_form_mannequin_online_india.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/royal_oaks_elementary_school_sun_prairie_wi.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/contract_agreement_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/golmaal_again_title_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/5._1_graphing_cubic_functions_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/garonerebepidirinilolud.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_off0000cb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0C 4948 bytes
SHA-256: b4431121a2aefd090763d877b96ba8f1caaf094a2c1d2308289de603bf6ddc8e
font_01_sfnt_off0000dbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDC 10964 bytes
SHA-256: a69c38ea5e2d2c326a579d8a7c9a5092a812761bb8f6f1e438435c4290c79e49

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