Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43b7e6428ce3817…

MALICIOUS

PDF

63.8 KB Created: 2021-01-11 07:53:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d1ab4f8b586b2b3df2f5f6120017440e SHA-1: e7ca2268ef56e97ae7e6ba90a38379f64abdea7e SHA-256: e43b7e6428ce38170e4212b8486d1caa215ba4869d49dc373c6b92e72a163e8a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffking.ru, which is disguised as a weather report. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of a malicious URL and the nature of the heuristic firings suggest this PDF is designed to redirect users to a phishing or malware distribution site.

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=dibrugarh+weather+report+hourly In PDF document text
    • https://cdn-cms.f-static.net/uploads/4465255/normal_5fea2451e1436.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/piiwh7j/carrom_board_amazon_prime.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/bchgHgh/ronabodirajolofis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479446/normal_5fbeb0c4cc9c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475397/normal_5ff4c28f03a9b.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/megelugik/android_device_root_software.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/ascii_hex_table.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/passenger_endorsement_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/cleanline_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/xoxuwelakod.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/bobukokeligonikawo.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/8609878814.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/sonukibaguzuga.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/zodasud.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_off0000be79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE79 5236 bytes
SHA-256: 9c94b0bbf91ba7f2fa0684d2849a905cb5ffdab2cffcc2f9e855b6cc6750b83d
font_01_sfnt_off0000d05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05D 9816 bytes
SHA-256: 14888d3a4cca84413e747c39273531681c46b636329302d89d27402b1b6b6ba4

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