Malicious PDF — malware analysis report

Static analysis result for SHA-256 229055c14cef757e…

MALICIOUS

PDF

101.6 KB Created: 2021-02-25 14:25:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4671ce412a34fa41d2b7a322949b4e3c SHA-1: d7360fd86693604e8b5bb6d5ac6bbaabcf9f11bc SHA-256: 229055c14cef757e7aa50a5232752d567bf69d62121084a65c399ac3398a8a54
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO poisoning attempt. One of the primary URLs observed is https://bologen.ru/award?keyword=gdp+per+capita+income+inequality, which appears to be part of this scheme.

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://bologen.ru/award?keyword=gdp+per+capita+income+inequality PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388612/normal_6034ca35ae6af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372399/normal_5fcc52deae1cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486537/normal_5fd03daa9be65.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wawivoreso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378846/normal_6008b81370665.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421366/normal_5ff3ceb455700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450158/normal_600fb57c9c8a8.pdfIn PDF document text
    • https://xopomosafeg.weebly.com/uploads/1/3/4/7/134732974/xasapaw.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/how_to_sketch_a_rose_easy.pdfIn PDF document text
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/62657.pdfIn PDF document text
    • https://gekowodi.weebly.com/uploads/1/3/5/3/135321574/lewule-viweda-mutalo.pdfIn PDF document text
    • https://gomamuna.weebly.com/uploads/1/3/5/3/135304292/sekivazerigafo-jazafuferu-dulabusonow-jamorezetelones.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/radio_shack_scanner_mods.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xomapagovujux.atwebpages.com/gedapisotule.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/checkpoint_datasheet_5900.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/6058767639.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F2 5184 bytes
SHA-256: 2c7dfcbdd06181b586a40b96e44ea47a2e0c87fd371ac81b0e9652915dd7cd1c
font_01_sfnt_off00014882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14882 16212 bytes
SHA-256: 078c2fe071cb309fbbaed5ff2ebb96eb82c79b752fef2fc65015ec7b4c2f25f9
font_02_sfnt_off00017b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B30 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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