Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a95fa7578946506…

MALICIOUS

PDF

70.0 KB Created: 2020-11-25 10:16:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a2a8d680c8f17dcd60865a1d413ce808 SHA-1: d379ada0f4581f9101cb198323cd03bac079f373 SHA-256: 5a95fa757894650653e96da524d078b5a7e38c4a92dd6ac51f58471450927310
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffe.ru/123?utm_term=bromine+electron+configuration+explanation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496216/normal_5faf85aa7b281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5fa6837c43783.pdfIn PDF document text
    • https://gabesusot.weebly.com/uploads/1/3/4/8/134895193/fukeboleruwu.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/0b6999acd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_5f8ffc8d5ad17.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/fa10cae5-32dc-47f1-9574-e6e1a36a8286/92969143953.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/womogilikivujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dabbabb3-9ee3-450a-b131-dc08a1e2e03a/56077621106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a85b22bb-207d-4a5c-82c0-21d40ffdbf4f/76183693221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10a6e89-cbae-4d51-88b4-8be27f6f768d/nexowidutolepete.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/18786798693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/672a029f-ec8a-4216-a1c1-d9217db38ec9/avalanche_vs_sharks_season_series_2019.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_off0000d504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD504 5272 bytes
SHA-256: ef08f7c6ab344c538d659a78cc47ae932a10c55078c030cf4b8c20dbc8abf890
font_01_sfnt_off0000e6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 10608 bytes
SHA-256: 80edc976020df3a0a0fbc3965d4f3a7ce4d4598fedd79ee047be80b8c0031911