Malicious PDF — malware analysis report

Static analysis result for SHA-256 2052e75aef293fa9…

MALICIOUS

PDF

75.8 KB Created: 2021-02-26 09:49:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 97bb2656bc8ee28d5324ccc6b11ebcf7 SHA-1: 2add8fe38c0636d088a263def29ac0e884ff2b1f SHA-256: 2052e75aef293fa96773a15dbcd118b9983207d703e6084a6178dd7b50dd5677
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 0.9984

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=aatsp+poster+contest+2020 PDF link annotation
    • https://cdn.sqhk.co/todusukiraxi/YHGFWdk/great_little_war_game_full_apk_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502567/normal_5fcda179f29f9.pdfIn PDF document text
    • https://cdn.sqhk.co/ledirevobep/3jcgfie/9420418495.pdfIn PDF document text
    • http://javatow.22web.org/the_rich_brother_tobias_wolff_analysis.pdfIn PDF document text
    • https://bulodogezuso.weebly.com/uploads/1/3/4/8/134868115/71a2c8b7a.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/gigjovM/chennai_super_kings_2019_players_list_with_price.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/jbg0Jkc/zaruwizupexedosajuletob.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/gjgiie5/xepomavoviresovigafobese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kasowudut.rf.gd/how_many_quarts_of_transmission_fluid_does_a_1997_honda_civic_take.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_off0000ed06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 5156 bytes
SHA-256: e87ce4cc98aa05d5e60c5cc7daae624dccec532c92ee72843f9a669779ee1264
font_01_sfnt_off0000fe9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9C 10720 bytes
SHA-256: c8ef9328350a8ef6c15b2a6cb6a3e786c5632a11f1729adc9a44383c0b5a2382