Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e8d769ac73009c…

MALICIOUS

PDF

72.7 KB Created: 2021-01-12 22:35:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 11733417567bd369e95f53152236f37f SHA-1: b48aca7360ed8d561f89e6001ece4557a48f009b SHA-256: 72e8d769ac73009c494c2133958fb1246b3aa24d97e6fa963664b93bd382c95c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=how+to+wash+a+columbia+jacket'. This URL is likely used to lure victims into a phishing or malware download page. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing/malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=how+to+wash+a+columbia+jacket In PDF document text
    • https://static.s123-cdn-static.com/uploads/4393752/normal_5fc3fd476e9a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368230/normal_5fe2149baa8d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482424/normal_5ff0bef4bc918.pdfIn PDF document text
    • https://site-1176551.mozfiles.com/files/1176551/music_landmarks_chicago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5fd36a3283185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471985/normal_5fa83e93c40a2.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/zBjasAH/semewota.pdfIn PDF document text
    • https://nelugawoteraxum.weebly.com/uploads/1/3/4/7/134707069/kijemozukuk.pdfIn PDF document text
    • https://site-1180367.mozfiles.com/files/1180367/splash_car_mod_apk_download_ios.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/tibanepoxilibud/ppt_templates_for_seminar_presentation_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/28847372169.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/terms_of_service_contract_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/market_research_reports_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/adenosina_antiarritmico.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_off0000df7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7E 5276 bytes
SHA-256: fc37ccb89e1f642dd2da588494e736c0d25077d1df8952ccabd284cdfe7fa300
font_01_sfnt_off0000f15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15D 10852 bytes
SHA-256: 358d72662842b618b218922a118f6a40f539af757382336d8616bfcc07476d96

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