Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12e444a6be074fd…

MALICIOUS

PDF

66.1 KB Created: 2020-11-19 06:39:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8269a9c507dfd0b5234d06af429864c SHA-1: 6cb0a8c30cb3521f6519050d820e1be728e6538a SHA-256: f12e444a6be074fd05baeb11b70de7d89a8076316b8def425e76870938b180cf
154 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a known malicious domain, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded malicious link are sufficient indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=morning+thunder+tea+review
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1acf2ff7-8675-4ea7-8f7d-a51812a27a23/57384668235.pdf
    • https://uploads.strikinglycdn.com/files/e8e3d107-c60c-4236-9ee5-eb8ae481e489/mapetubugosiru.pdf
    • https://uploads.strikinglycdn.com/files/2b93e592-f034-4236-8ec3-b0939ce5fb70/what_would_you_like_to_eat_in_french.pdf
    • https://uploads.strikinglycdn.com/files/638ada8d-cb3e-452c-9c4c-2f5bf606f422/50662144080.pdf
    • https://uploads.strikinglycdn.com/files/2826913e-9bc5-43ba-b9d2-579c96185b1a/jofikirupemupojuvedameso.pdf
    • https://uploads.strikinglycdn.com/files/5cd4b1e0-7a50-4529-80b7-4cb56deffb04/99832907135.pdf
    • https://uploads.strikinglycdn.com/files/0840b5f9-721c-4592-9501-09a550721586/kivokagi.pdf
    • https://uploads.strikinglycdn.com/files/b85c6878-1dfc-4f5b-8deb-79bff83df884/sevijepese.pdf
    • https://uploads.strikinglycdn.com/files/4392f379-b7a3-455b-bc01-0a1e64aa8f98/62566982295.pdf
    • https://uploads.strikinglycdn.com/files/7d4f1a73-5e0f-4f1b-adcd-37cee769b837/pifuzajofulubamupuxukav.pdf
    • https://uploads.strikinglycdn.com/files/56fcb6da-79ef-49c6-9d29-351fd1bd0355/39040855053.pdf
    • https://uploads.strikinglycdn.com/files/00d93b37-506c-424c-baa6-bc56daea849a/age_of_kings_skyward_battle_guide.pdf
    • https://uploads.strikinglycdn.com/files/acaf43a3-0414-41dd-8a9f-2200db563485/bitopubafipijavazamimurom.pdf
    • https://uploads.strikinglycdn.com/files/1ae82397-ee5a-4b57-b85d-d8f4eb552828/mlb_kelly_nash_images.pdf
    • https://uploads.strikinglycdn.com/files/5d397c32-095e-478d-b279-41890da5c447/dimebodife.pdf
    • https://uploads.strikinglycdn.com/files/31ea4df5-cc92-4957-8cd4-f6af9041e4c4/tibuxavamuxusakakazetod.pdf
    • https://uploads.strikinglycdn.com/files/4a4b6508-af88-46de-8fe5-1492f3aa5fbc/24754664924.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c44d.bin
ff63a7e4f1ab64d3d7cd946c00e331ffb67f43e21d40d2a9154732001c05fab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC44D 5032 bytes
font_01_sfnt_off0000d584.bin
8f8866a7dd3b6b2b7d999de47d1bf48129736a2b0cc865c5dcbd31b7c38fb81b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD584 11052 bytes

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