Malicious PDF — malware analysis report

Static analysis result for SHA-256 c849e0c9852e2eaf…

MALICIOUS

PDF

85.8 KB Created: 2021-01-16 00:14:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5bab9c74e82f1634b9d325ef7baf1d06 SHA-1: 0ac2e235854d52e55ec96d2e723a842d66346cae SHA-256: c849e0c9852e2eafc87e6c7127dd6702a132489d66a353d2c599abf6b401f651
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for linking to a known malicious redirector and a high-confidence ML classifier. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic indicates the document's content is designed to trick users with promises of prizes or funds, requiring them to interact with a parcel delivery. The embedded URL points to a suspicious domain, likely serving as the initial stage of a phishing or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=ziwi+peak+cat+food+chicken In PDF document text
    • https://cdn.sqhk.co/goberirud/hgih5if/earn_to_die_1_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/UjjmzhS/fimexiseduwiki.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/2je0ghy/22313228650.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/hggjq2l/international_superstar_soccer_2_snes_rom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5fdbcd9cc9ece.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fcf49ececedb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5fa7149e6c05d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5fabffcf3f381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444885/normal_5fd6242a56d9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5f994b6436938.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460980/normal_5fcd13944f06d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371020/normal_5ff4b5042f171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/nofozasuliwe.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/limiting_reagent_worksheet_2_with_work_shown.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B6 4840 bytes
SHA-256: e0cb0ab924044a120466ad13b0dfb769d8a92738ac83b7cf68f1207cb60c0a13
font_01_sfnt_off00011530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11530 11660 bytes
SHA-256: d007997b4b2379cbaf0c0677a9c342859be152d01ffed76a109267bba333a58d
font_02_sfnt_off00013c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C17 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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