Malicious PDF — malware analysis report

Static analysis result for SHA-256 863d328bcc817ca7…

MALICIOUS

PDF

68.1 KB Created: 2020-11-29 05:54:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f878014ae5f484fde0df6995a8253752 SHA-1: b860501f435129fe21f2b4cc9bc99c7c7d0425a3 SHA-256: 863d328bcc817ca7a13642673e301c6fe74689175fccd01566c6857ffbb9490f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://trafftec.ru/123?utm_term=ash-throated+flycatcher+nest+box', which is likely part of a phishing or social engineering lure. The document body, though heavily obfuscated, contains text related to 'Ash-throated flycatcher nest box' and application metadata, suggesting a pretext for the malicious link.

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://trafftec.ru/123?utm_term=ash-throated+flycatcher+nest+box PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418391/normal_5fbe546a469f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f9e2e53a13db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f8d8a497a5ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8e1fbde731b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_5fb60a0f6721a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f8b7b1b873b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_5f9a03fa86ed5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_5f9f617162a40.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/a159429a-f799-414a-a6b8-afba1ab515dd/89091942001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ac7f73-09c6-4ffb-9dd3-02b68439d2b6/tazejix.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/free_keynote_templates_for_powerpoint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be404fd-1c7e-401f-8f04-a0f2516b3a3e/junumisetejekopudop.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/tadepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e815c793-bab5-4459-a885-5cf1ae54fdd7/98728427051.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/evenflo_crib_assembly.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_off0000cdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF0 5440 bytes
SHA-256: 7993ada18bdc225c326e77d6c4f45c2e958a7ff3921086f797970b5e3b88c516
font_01_sfnt_off0000e084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE084 10328 bytes
SHA-256: 99ad4e8a89d1652d992f81453bcfb535ec0bb16bbb0727f66003494efc680c11

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