Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2614cf6646d2ee8…

MALICIOUS

PDF

89.7 KB Created: 2021-05-19 05:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bf6938a8304e87b775a8c363d85d3cf SHA-1: d8481c51fe1bffe9f607172bd844518bf8ac902c SHA-256: f2614cf6646d2ee805c04ff9364c859a4ad8dafd4f8e39d4d5c50325ba908903
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating it is part of a link farm designed to drive traffic to external sites. One prominent URL, 'https://jacksth.ru/strik?utm_term=spider+man+ps4+free+download+for+pc', is presented in a way that suggests a lure for a game download. The presence of numerous external links, including one pointing to 'http://wumegugafetanto.rf.gd/foriterowebiferuze.pdf', further supports the malicious intent of distributing or linking to malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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=spider+man+ps4+free+download+for+pc
    • https://fisusaweku.weebly.com/uploads/1/3/1/8/131857315/308224.pdf
    • https://lowezikalazana.weebly.com/uploads/1/3/0/9/130969016/4321027.pdf
    • https://cdn-cms.f-static.net/uploads/4491969/normal_603f4e26e2a95.pdf
    • https://lakofanagobogan.weebly.com/uploads/1/3/5/3/135386994/8826362.pdf
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5fdb6055026ea.pdf
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/eb7e4b215.pdf
    • http://pigekofok.22web.org/foviwulopijodajixabil.pdf
    • http://mudelukise.iblogger.org/2208358525.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wumegugafetawi.rf.gd/foriterowebiferuze.pdf
    • http://bowelabu.rf.gd/libro_para_aprender_a_leer_y_escribir.pdf
    • https://s3.amazonaws.com/zoxewudunigus/32426742111.pdf
    • https://s3.amazonaws.com/legenapi/77255954262.pdf
    • https://s3.amazonaws.com/midaguvimabof/dokumelibu.pdf
    • http://nifopufu.epizy.com/interest_rate_swap_agreement_template.pdf
    • http://kozuribu.rf.gd/doleluvukunijazu.pdf
    • https://s3.amazonaws.com/xebuvuwov/vavip.pdf
    • http://wupomadupu.epizy.com/gorizepezemezulep.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ae.bin
7dae22bc394f4267ed25f13730ab72e8522c6cb875b1e0fb28f312bb020f71a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AE 18048 bytes
font_01_sfnt_off00011f35.bin
41373ef5b90835667a89f78fc8fbc7646b1f14e2441d4adfbb4c0e09fddc4f51
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F35 5584 bytes
font_02_sfnt_off00013238.bin
18a8b08d75d59711ab8aee571d2cf18b0c3362308a258acba38dd3a9bc111104
pdf-font-stream PDF embedded font (sfnt) at offset 0x13238 10928 bytes