Malicious PDF — malware analysis report

Static analysis result for SHA-256 e73f68e511aab1f2…

MALICIOUS

PDF

95.5 KB Created: 2020-12-18 20:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: aced75a2538082d056c95356999de0d1 SHA-1: 985d4bb071aa7d1bace19954ed43ccc43554620e SHA-256: e73f68e511aab1f2fd789a3c8022fb0723ff96ef91178b4ca507cea6475b79c7
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 the URL https://gettraff.ru/strik?utm_term=presidente+de+mexico+en+1960. This indicates the document's primary purpose is to trick the user into visiting a potentially harmful website. The ML classifier and ClamAV also strongly indicate maliciousness, consistent with a phishing or redirection attack.

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://gettraff.ru/strik?utm_term=presidente+de+mexico+en+1960 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5f8d0eed79c38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391602/normal_5f91a9a5ebf82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_5f965fea78d9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374177/normal_5fce057a228ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480755/normal_5fc859bacc161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd22367849622016c47c1b/1606230588877/practice_and_homework_lesson_7.2_answer_key_5th_grade.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d700ea4a794d5651c29e/t/5fcee404faf0bc04d1bd2892/1607394308434/sve_sto_znas_o_meni_lyrics_translate.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/86240062155.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0efb33398ff75152e3ec8/t/5fc50e14e18c5c478e9adba9/1606749717541/11350861333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/516ab521-ed0d-43eb-8e62-bbceea7a635e/ask_and_embla_vs_adam_and_eve.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59635085bf90c0e1cfcff/t/5fc7f0ea670b6a56db6d06cb/1606938859362/bike_attack_race_game_moto_driving_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1479b1f5-6a4c-406b-9e8b-461ba38c656c/administracion_de_recursos_humanos_p.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/jane_from_daria.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdeefff3de5e49b52925c2/1606283010589/kixubojadunekuwoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0146a96e-6f4c-4eec-bb82-03f043ccb2cf/gukafirapile.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_off00013764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13764 5416 bytes
SHA-256: 587ebf53f2da52ed4f39f82d6a6d745cd96f7e19257bba2148cf6ea5d01fa8e1
font_01_sfnt_off000149bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149BF 11568 bytes
SHA-256: 3e53950cfbd888f0ebe7f1db615e06cd406a91420ef7941b9ce43ab46da1b2d2

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