Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e43d92f17aa005…

MALICIOUS

PDF

44.3 KB Created: 2020-11-05 11:56:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: be9cbbfe9e2504998efe3ff5512bdcd4 SHA-1: e86a9c7dfdf0b87226c660c58a3f3bb9c6263a9c SHA-256: 54e43d92f17aa005b51332e4f23713f9f705e8fc8738f920cd09c15f2f47fbb5
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link disguised as a 'marine corps promotion manual 2016' which redirects to a known malicious URL. The ML classifier strongly flagged this PDF as malicious, and the embedded link is a primary indicator of a phishing or redirection attempt. No scripts were extracted, but the presence of a malicious link within the document body is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ttraff.ru/123?keyword=marine+corps+promotion+manual+2016 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f87770e240ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f8d80b41f1d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_5fa2204faf09a.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/ae679e53-cf41-42b7-a198-56bdf268a1d9/vipufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a66a7d-7e3c-4ee0-8582-c67d5505d6b8/71875432867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/913aed50-3162-4e65-8728-8aacd357852d/9093220468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af974400-3356-431c-868e-cdfc14987b48/61900132785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db523a2f-417f-4218-bd40-a8199fd1025b/the_tell_tale_heart_discussion_questions_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/069c788e-dab0-4abf-b625-91ca1a2d9ca7/precios_nissan_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4600c9af-01a3-4186-a995-a6e9dffcdb0e/48147539665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b2ca66-7add-4003-b1d5-2e4605b05bb9/papa_louie_pizza_attack_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db19628-c4a5-4db3-9177-b49aded1682c/panickker_switchgear_sriperumbudur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6e9428f-db58-4ff5-b188-e9796670c064/99334064969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/303f0aad-7479-4ffe-a801-929432575c05/mazazarawulagusimegisovur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77203642-9573-45ab-970e-20739f9b6e9c/xuzamopagajetagudilad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae3c81a-a80b-4860-8be8-1ac95303d28a/gavulazeza.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_off00006c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7C 5564 bytes
SHA-256: 626f1c942f2957a529bf7bb377f478c431927cf809801f11acf4e2c486c718e8
font_01_sfnt_off00007f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5C 10912 bytes
SHA-256: eaf18b26e5dee2a1b85590dcc2755428b977229600118f82cb6d0658d6468c01

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