Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4382bea61cc89ea…

MALICIOUS

PDF

76.6 KB Created: 2020-11-23 16:24:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f4387caee40b2a1d2f395b3ce551b92e SHA-1: 75b25321be1ea6bc4d3198269cba681c91510b36 SHA-256: e4382bea61cc89eab3e3596fabc966e3f15d753fa84912ec253c90992b9b9617
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://traffking.ru/123?utm_term=premarital+counseling+guide+for+pastors'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/123?utm_term=premarital+counseling+guide+for+pastors In PDF document text
    • https://cdn-cms.f-static.net/uploads/4496592/normal_5fb5c3bb516fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5fa35e75ef908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418180/normal_5f987d79ba535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476780/normal_5fae3884308e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447087/normal_5fba244301f38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5faa020c8f5a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f8a97793ab24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_5fa84ac71ed59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420037/normal_5f96296b7aa27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5fa8803a5667c.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/boxujetanonikuv/to_do_worksheets_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/family_barber_shop_staunton_mall.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/gaudy_night_sayers.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/nogigaxewusesad.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/fubawapawemujolazuz.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/forensics_science_for_high_school.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_off0000ef66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 5476 bytes
SHA-256: b15e47f4a82782bb6ce46c9fd954e7b7fc9b46b3ceee00e3eb6d5b5fa31b44ec
font_01_sfnt_off000101ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EC 10388 bytes
SHA-256: adbcdee75d2a57d3fb718ce3c29e28d4f8f8b02e700c2950872165e6e0aec3ef

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