Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee041353940b3db…

MALICIOUS

PDF

61.1 KB Created: 2020-11-17 18:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a18468c0b4c8e7b9e4e552bf087d6467 SHA-1: 923d19fe2cd48a940047ecdb2153a240abc81f98 SHA-256: aee041353940b3dbe5d1961254d5510876fad4e621ec06d8b2b46b644b802201
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://traffking.ru/strik?utm_term=albert+paul+malvino'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=albert+paul+malvino In PDF document text
    • https://namoniwuxixipej.weebly.com/uploads/1/3/4/6/134606628/3372003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5faab3080c75a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5fa1703f1ed7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f886f627b38f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5f91e386bca3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/910414e7-5835-4622-a8ab-f76166d6a7ad/hd_dieu_wallpaper_pour_mobile_1920x1.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/world_record_for_shortest_mile_run_time.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/past_simple_regular_and_irregular_verbs_exercise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5172b54-e59b-4a66-842a-e1d9c5f0daa5/wifeluvubetemusojiwetuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0084206-43dc-45c5-8741-86603569571d/60765192823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deed13c6-b02c-40a2-9420-e073f6e983f2/nuwudikawofafakimow.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/54530836473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/661acd3e-cc3e-46ab-a9bd-486f749c442c/26704125071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d493077-0b84-4c33-a2a8-152e7cbbfa38/70008284788.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_off0000b10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB10A 4976 bytes
SHA-256: f4ea6dffad27cc44902ab963a0179a783ddc4720f4de1958510e6a2f95e62cc4
font_01_sfnt_off0000c1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DE 11688 bytes
SHA-256: e213794de48328eb5b12ceeb88eebded36367512e2d01a0346b231eb2d71a312

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