Malicious PDF — malware analysis report

Static analysis result for SHA-256 d91b2167117b4fc2…

MALICIOUS

PDF

68.8 KB Created: 2021-03-07 04:43:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 066c23b3a02fd225942303b156866089 SHA-1: 9ba77f721387c34a6e8d74ca97cf9ba77af8b43d SHA-256: d91b2167117b4fc2d444dfffc59a0894584b634966a4f40f9a5642cc24c98106
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://seumenha.ru/wix?keyword=ida+b+wells+middle+school+dc+address PDF link annotation
    • http://life-news.tech/cuneiform_fracture_dislocationapaa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_5fd1f1659830f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426280/normal_5fe7f85501680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383340/normal_6022082e1abda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403818/normal_5fc5c64e2cf00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475376/normal_601cffbde5fb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5fd31a4093cf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402940/normal_6041ffe700cf0.pdfIn PDF document text
    • https://xiforamuti.weebly.com/uploads/1/3/4/6/134611992/5301528.pdfIn PDF document text
    • https://vajefusuvujob.weebly.com/uploads/1/3/4/4/134464162/rinuv-dukuzugomufosin-mebaki-velemuzimevuxew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486041/normal_601715bcb40b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389805/normal_601de1873ef3d.pdfIn PDF document text
    • http://hugertely.xyz/how_do_you_get_thinkorswim61ujj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_60262919cae10.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/771b04f3-050d-4fa3-8896-9d047676723c/what_is_the_navy_creed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66228ccb-3d0f-41bd-ab6f-58fcec425076/craftsman_chainsaw_358_fuel_line.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B9 5348 bytes
SHA-256: 1c7c0406ec4e9938d12b202901f3ccee8242b34dbd018f2e184e3abb2e83c85b
font_01_sfnt_off0000e2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C9 10248 bytes
SHA-256: 80961551a3a0adc8262d165ce399ee9fef84da87b98983885419e11b97709724

Open this report in the interactive analyzer, or submit your own file for analysis.