Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc1cac528eac08a…

MALICIOUS

PDF

70.3 KB Created: 2020-12-04 04:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cc5a4789370a3391d453dd4364024d0 SHA-1: 1ca4026eded7ae45449660415e38f30359968cdb SHA-256: 2fc1cac528eac08a97f538d7fc61b07d5a027477bdf4ba4d24fd2ae8a96e1249
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to malicious content, potentially exploiting PDF vulnerabilities.

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://traffking.ru/aws?utm_term=kindle+ebook+format+umwandeln+in+pdf
    • https://cdn-cms.f-static.net/uploads/4391314/normal_5f948ef09fd1e.pdf
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5f92318de2ca8.pdf
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5fc29b771d8c9.pdf
    • https://cdn-cms.f-static.net/uploads/4446374/normal_5fa52d1e0a1e7.pdf
    • https://cdn-cms.f-static.net/uploads/4417814/normal_5f9d582c7f37f.pdf
    • https://cdn-cms.f-static.net/uploads/4486042/normal_5fc15abc25e11.pdf
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f9fc7a3afebc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc64e6c2e34347c70694bb4/t/5fc6eb849dfc2a404510d3f7/1606871941249/1st_grade_math_word_problems_addition_and_subtraction.pdf
    • https://uploads.strikinglycdn.com/files/6960a93d-162a-4f5d-bcfa-df51a6e67085/warframe_incubator_energy_core.pdf
    • https://static1.squarespace.com/static/5fc10a3d405d5340f32a5a2f/t/5fc568b3f81c9a2a0c597fb8/1606772915663/45186851803.pdf
    • https://s3.amazonaws.com/lovetijif/amazon_fire_tv_utility_app_v0.64_download.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4e333485235c86bcd19d/1606372916621/pufibedinixarisegukubak.pdf
    • https://s3.amazonaws.com/kigavanus/nios_deled_assignment_front_page_in_english.pdf
    • https://static1.squarespace.com/static/5fc32cce11f6a4198494824d/t/5fc8506e8eecd53e39e6746a/1606963310893/rem_log_home_restoration_services_llc_of_colorado.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb14.bin
97d580d3a5a2c94522da5dc8509e61d783e5fc87df4b57766941f8b97baa1c9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB14 5156 bytes
font_01_sfnt_off0000dc82.bin
4eb95742d0b3a1d2ae48d1847615894116ac1a91f4cc279d1e85890e1276f039
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC82 9900 bytes
font_02_sfnt_off0000fe66.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 4324 bytes