Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f1fa2fa4494093…

MALICIOUS

PDF

67.8 KB Created: 2020-11-23 07:35:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e6f7b1dde3b4f4137661aa9d25469613 SHA-1: eb5433ba90ea3b5e20e11b8cfff7ff4e9921ce83 SHA-256: 52f1fa2fa449409356869b44aa78cd36714805b18bc03280bbaf3c38a1fbe4c8
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, traffking.ru, which is disguised as a download for the 'Airtel money app apk'. This indicates a phishing attempt to redirect users to malicious infrastructure. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=airtel+money+app++apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_5fa029e0adc32.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/juvetaso/worksheets_adjectives_for_grade_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2e9b1b-5c07-4804-8a3b-56b26982d27e/46648595532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28856d8d-6003-44a3-98ab-5402dfc0ba7a/bizafazotafejakobafi.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/schindler_s_list_sheet_music_violin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c711b99e-2cdf-45ea-885d-daa8d10c33bb/wisoxepuwoletuleterojazot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbf37446-abf4-4a42-9106-333b88f8657f/bien_dire_french_audio_magazine.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/alteraciones_geneticas_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/adjectival_form_of_comparison.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/kidotejegojajiboja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d4f85c-cba4-496b-bb30-da28a73c53a1/conductores_aislantes_y_semiconducto.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/dalixaxapole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6044441-8694-472a-a20f-72515f52741f/90417626811.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/roxasigizigezi.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_off0000d023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD023 4940 bytes
SHA-256: ba0bd11968f734b3a7917d07eb4f93361ca5115ad3bcf658a611798181f859be
font_01_sfnt_off0000e0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E1 9768 bytes
SHA-256: ff5950483f06197b7abac99bd98c2c345981ffc495a8b5e515e99276e5e79093

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