Malicious PDF — malware analysis report

Static analysis result for SHA-256 239f15719dc84a9c…

MALICIOUS

PDF

44.5 KB Created: 2020-10-26 19:48:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: faec766fde5476a51d7ccb16b9851238 SHA-1: cb4b298bb599a47e2180e6c3669a6ab1c66c5878 SHA-256: 239f15719dc84a9c23a5f781aa03511255e3cd33a49ef56b5853231289513788
154 Risk Score

Malware Insights

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

The PDF document contains a link disguised as a Volvo owner's manual, which redirects to a known malicious URL. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's part of a link farm designed to distribute malware or phishing content. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?keyword=volvo+xc60+owner%2527s+manual+2019 In PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/fd1b3209b9d.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/matuwaduwuvibad.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/sadokuxarezug.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/eb952ccc-1f69-40a5-9b0a-4fbbd28eecc1/85912287948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80371cfd-3f4f-4bf0-8653-2c247f9b2137/nutaroguleroboxugeneri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f1ccbc0-a8be-4e46-9432-a19ea39825f0/leather_earring_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15cd7a2d-a33d-4f44-9747-0ee27ea6d254/47781633549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/187c9dee-d461-41c3-a8f2-ef52a4f168a6/julezuviwaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb93e9e0-1587-48a2-9ea2-2a6b51ee2fd6/pasiphae_and_the_bull_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855d1b49-b7b3-4be0-b39e-842da479d976/letter_f_worksheets_for_kindergarten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4b4567-571d-42a3-bab2-d1a5fb551bf5/kixosuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df9f7c7-2062-4923-a476-c8ffddd66e8e/73908360882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5295/7335/files/fekixujetagowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2961/3725/files/climatology_for_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/ahsan_ul_hidaya_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/dizetike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/916321d8-33d0-4179-9fcb-fc4fba4a4af5/pieles_nuevas_a_fortnite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88913426-7368-442e-bdf6-f1d755f31c41/tesogigagazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4031ee39-2e8b-43b0-bd6c-682a175858ab/wigivitikiset.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_off00006176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6176 5800 bytes
SHA-256: 0289999f14bf6fc3b6c8647a7d5f260ba652bb8b88be0a3ee7dd6d66e1dec37c
font_01_sfnt_off00007533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7533 14620 bytes
SHA-256: f4434746acb375b8b4379c67756f0acf14403aea23336a54b4d628fffc0c5032

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