Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9786fd0adb43eb5…

MALICIOUS

PDF

75.9 KB Created: 2020-11-11 02:05:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6d65a5b5e9115fed624e755cd8e48179 SHA-1: d2ec540d30e64279fae4a28fc264d26b7ba67d91 SHA-256: f9786fd0adb43eb58554066ded0eee2feff1075f4c88cfff2963fb37460e41d0
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'traffine.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a review context, which is a common lure for malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?keyword=arcadia+band+review+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386079/normal_5f9907390d98a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f92719ce2558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407066/normal_5faa4ab77e03c.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/30771d12-31f1-43ac-87ab-6744d902eb6e/92832714924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a08afee0-e4a2-418c-8369-6d9e1ecb0f26/93487971905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51fe47a6-521b-47be-aeaf-342b7a97cfb8/luvukipidavadaviva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c753476-83c6-4cca-b991-b0e84cf77993/didelaroxafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6de95e9-9cd6-43e1-be4b-62207903b5e0/wuxenavubem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2358931-9478-46e7-b5f7-d71662edcd4f/benjamin_marauder_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae3bf14a-68f0-49d0-be57-ae0cff373980/vijajuganuzapaxula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f5025f-8d28-4a92-9642-cf7f73387f8c/endocrine_system_coloring_worksheet_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC65 4516 bytes
SHA-256: ec401e7e72f9e431ebae7459d2a1e08c43366e643d3f431b3d629c8aef83d671
font_01_sfnt_off0000ec61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 5484 bytes
SHA-256: 15c5a16e74189b69d5d298404ef7643a7f066ae45546e3a06934f453d779f532
font_02_sfnt_off0000ff2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2F 10756 bytes
SHA-256: 2e6ca456265fc6977ec937b7f982c1af5e20c1b44ba6bda16b6c5b8b43a7ed94