Malicious PDF — malware analysis report

Static analysis result for SHA-256 40ac266213eb66cd…

MALICIOUS

PDF

73.2 KB Created: 2021-03-21 01:13:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 50b5c254e7624fdf108a9caaeb7094b6 SHA-1: e70163768fd86b8fcebe748c6f7399b35b5517b2 SHA-256: 40ac266213eb66cd68ec0b4ca9b0e8e21938b8ce9e1c89f2e27976041fa55325
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 0.9998

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://jacksth.ru/strik?utm_term=pride+go+go+scooter+for+sale PDF link annotation
    • https://galekogikelubem.weebly.com/uploads/1/3/1/4/131438025/xikobitover.pdfIn PDF document text
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/5891bea81d3ef0.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/tusitonoto.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/how_to_be_a_better_conversationalist.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/3455747.pdfIn PDF document text
    • https://poxagubojawi.weebly.com/uploads/1/3/1/4/131482812/gawujuredab-nubeduji-pixidesexuboz-pigekipu.pdfIn PDF document text
    • http://musomojil.mywebcommunity.org/electromechanical_actuators.pdfIn PDF document text
    • https://jaxanotev.weebly.com/uploads/1/3/1/1/131164383/6a21b607.pdfIn PDF document text
    • https://wukajimodowel.weebly.com/uploads/1/3/0/8/130874313/munukezuriwumip.pdfIn PDF document text
    • http://noxogejukebe.mypressonline.com/rudram_chamakam_tamil.pdfIn PDF document text
    • https://gebijodefilamoz.weebly.com/uploads/1/3/1/4/131406109/7c1930a9c53f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezofakarol.myartsonline.com/zetisalavokejibefasug.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/double_bed_sheets_target.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/annual_report_bksl_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/winevaludukogugamasutilu.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/nulagilibu.pdfIn PDF document text
    • http://kubomefewofumim.atwebpages.com/moca_test_scoring.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/fufawiwuvuzamowines.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_off0000e1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EF 5192 bytes
SHA-256: 73ea73d9444c0063c88399ccc678f862f8706313e70dc6ff4eb40fc53391b297
font_01_sfnt_off0000f3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 10640 bytes
SHA-256: e3cf5c815b8d5037a3b6a3b9b95394b45393361b7145e1e355afd14d6db58f52