Malicious PDF — malware analysis report

Static analysis result for SHA-256 b740e03f4f80750f…

MALICIOUS

PDF

73.2 KB Created: 2021-02-27 18:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 01b195df88184fd8250edf625c7ae99b SHA-1: 41566f563570db914d9839e3bbb90c2d7b257d06 SHA-256: b740e03f4f80750f128e7cc51831d1efdab749e871d64b64a5fd4d44b356d34b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to benign-looking PDF files, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing and trojan activity. The embedded URLs are likely used to direct users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/strik?utm_term=natalie+goldberg+writing+down+the+bones+summary PDF link annotation
    • http://lamakexo.scienceontheweb.net/la_la_land_free_movie_online.pdfIn PDF document text
    • https://pedagojewixa.weebly.com/uploads/1/3/1/3/131398360/fb56b47bbf3fe9e.pdfIn PDF document text
    • http://lujuvudav.22web.org/35427330217.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/wugipolirizejo.pdfIn PDF document text
    • https://taxajefikudo.weebly.com/uploads/1/3/4/7/134765143/popiv.pdfIn PDF document text
    • https://somalinoduka.weebly.com/uploads/1/3/5/3/135392385/a0c89068e2d.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/higi5hi/minecraft_dark_oak_forest_village_seed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/laginekux/63222542852.pdfIn PDF document text
    • http://rivadejupogutun.epizy.com/mcgraw_hill_10_act_practice_test.pdfIn PDF document text
    • http://ferenekukosazu.epizy.com/long_division_worksheets_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/jd_paint_3d_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/49518568279.pdfIn PDF document text
    • http://situxunekidini.epizy.com/free_graphic_design_templates_online.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/album_bts_world_original_soundtrack.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/papexiwumo.pdfIn PDF document text
    • https://www.amazon.com/Writing-Down-Bones-Freeing-Writer/dp/1590302613WithIn 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_off0000e180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE180 5540 bytes
SHA-256: 677b1f84ac91021ee42bc4331436a361de2a0b4c71a1393b9e03f4e77d04f575
font_01_sfnt_off0000f441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF441 10436 bytes
SHA-256: 967fab77ee79f2ce9e9a9adaebcbd82a7b726a7d1034ad823b4daa69ab502723

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