Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c61d9cf85dfde9…

MALICIOUS

PDF

67.4 KB Created: 2021-01-05 01:32:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c01334b9dc35befd933d9fc3d379aeb7 SHA-1: ad27a89cb8e2897fa7d058975d7a1fa763bb6aa6 SHA-256: 70c61d9cf85dfde914379ff3b6674282cdd2367f04ca44f0a9b3579b10141dbf
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://traffmen.ru/aws?utm_term=certificate+template+word+2015'. This URL is likely used to redirect the user to a malicious site for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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://traffmen.ru/aws?utm_term=certificate+template+word+2015 In PDF document text
    • https://cdn.sqhk.co/sevafeluba/j6heii4/10424750233.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/05d5e8a4-da29-4320-96a3-7786b587148d/overtime_necessidade_de_pagar_cpf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a386b2-6263-4b99-b0fa-be275fa89bb5/jigsaw_movie_download_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e601b7ab-b7b0-412d-9375-c30d5a4497df/bass_booster_youtube_pc_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/mendelian_genetics_practice_problems_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a0f0f3-ea93-4692-ac10-8a62124333ee/37229148380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9229bca6-f64f-4a13-8d55-990ddd6e3c39/537889518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3912bfe4-d92b-464d-a258-01d4bd42c993/lejesojukisoduwuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d001e79-b153-487c-a1b7-8514d0d86f9d/minecraft_educational_edition_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc28f8b-f60e-4925-a546-b857a63972e9/cadbury_unity_bar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fb70ee7-a3db-4ff5-a659-30e13ad502c2/xadutigidav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da9b467-25c8-4be6-910f-126d1c3230a1/3745550778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8754c199-af0f-44be-ba89-daf40d5d5578/easy_cake_recipe_from_scratch_vanilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95cfee0-321a-4a0f-bb0e-8e91181ed386/9674765158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2933425-2a38-4ec7-9f0a-56673f6e5234/18001867953.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/lubedabalasawetow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/847d2d5a-bf5e-47ae-97c4-adc45f0dd8c6/best_song_slow_rock_mp3_free_download.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_off0000cd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD12 5572 bytes
SHA-256: 987dffd527b94a68713e48bad07d861aea31f1e37079c325975821fc5526a235
font_01_sfnt_off0000e009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE009 9572 bytes
SHA-256: 72e6e45fcaf069f3c02c69bd2c2390bbcaaf4d7e2768520a6a2f0b7fe59f1671

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