Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59090e51723dfa1…

MALICIOUS

PDF

69.5 KB Created: 2020-12-01 08:34:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a76904eee7989af3f906170360b7fe87 SHA-1: ebfab4a2e3c07cd1ea11ec88676cce91dc056981 SHA-256: b59090e51723dfa10672da8b83f9670fccd8ab0aa9fed94eefe8d2bda4170fe7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'trafffe.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'Beco baby carrier manual'. No scripts were extracted, but the PDF structure and embedded URL indicate a 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/aws?utm_term=beco+baby+carrier+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385030/normal_5f8d8180c9013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390381/normal_5f911e6c316d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475987/normal_5fa510beb3fc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467277/normal_5fb8f39e3119d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_5fa1a6e61bd83.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/5fbf6c4908845d092483324d/1606380621517/2405941349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff559738-0c78-4409-a697-0f0a4ead61ab/jawozapozujuvaforib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d60715f-5838-4720-a354-679a2c58fac6/84204013790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0a5d54-adb3-419a-bcad-24785ece103e/plants_vs_zombies_mod_download_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0baa35687f52b6b804624/t/5fc1e8a73f75b166431921d9/1606543528471/salujovutolel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b53b9b-0db8-4ed8-9aef-b7b07940470d/the_penguin_history_of_latin_america.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd17de31dcc34bf48e0133/1606227935274/41175067734.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1571bc30a162e0c558f21/t/5fc5883ce18c5c478eb86e85/1606780988355/carnot_second_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2736399-1186-4251-a791-d4fb2ff9fedc/milalimeki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f975bf71053ccb109642/t/5fc1f4883f75b1664319f217/1606546569944/broadcast_journalism_andrew_boyd.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_off0000d515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD515 5056 bytes
SHA-256: a2b74ef68bd646779311ac2aa13e731882fea3d9b1f11c447c9122f9b786d6f1
font_01_sfnt_off0000e641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE641 10392 bytes
SHA-256: 04faeeeb11f78c2a2b84554f873cb5688f6ff73bb0a80cf8316fabab55853ee9

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