Malicious PDF — malware analysis report

Static analysis result for SHA-256 889e14001030d75c…

MALICIOUS

PDF

66.5 KB Created: 2020-11-16 12:31:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0fa73cc3aa89f395cd8df43715f662a4 SHA-1: dd8c6a0f704b81ca29fb3f6f54212e0ed036156c SHA-256: 889e14001030d75c7770c43a85db92d5ffa0f6958004ed9da012b4fc502c52bd
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/123?utm_term=mega+man+5+boss+weaknesses PDF link annotation
    • https://kiwemedorupa.weebly.com/uploads/1/3/4/4/134446537/pebujizodelu.pdfIn PDF document text
    • https://zixulelivu.weebly.com/uploads/1/3/4/5/134507035/bapetufapimulot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5f8cbdc381552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5f90ce44bff05.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/738ce4e8-001e-4ea4-80fd-017da8fcc94b/noxonur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef084f5-2eda-4d42-9c9a-4308f4165f20/18807970790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c4c0888-c18b-4a2c-8b15-43e1aa7474f7/diesel_watch_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e99c088-c2ef-492a-a4ed-3d8c4eed1c9a/user_manual_netgear_ac1750_router.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/45005169655.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/50040951325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4de83599-46d8-4f8b-8b67-1ec2b12f2840/zefewev.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_off0000c89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89F 5304 bytes
SHA-256: 308810cdd7ebb41ecd2bea20d37d6c760c5cbfd329865e6f6440b2dce805890c
font_01_sfnt_off0000dac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC3 10248 bytes
SHA-256: 97fe8d379c6737b6f5c53b48f383957f4430d436137175fd4339f2364250e23a