Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b476fdf83573bdb…

MALICIOUS

PDF

80.7 KB Created: 2021-06-10 09:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b57412863eee599111fb2ee243f2a592 SHA-1: b9d8a7e3a089ff2a138dc8de3b54866f794077f5 SHA-256: 3b476fdf83573bdb6d2dbb07b04031eb5470d2610d8f73a382f49d896f91d3f9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary lure pointing to 'botokaw.ru'. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. The document body, though heavily obfuscated, contains text related to a 'human development report', suggesting a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/123?utm_term=human+development+report+by+undp PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449399/normal_601b5f591d870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_604a182475476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476416/normal_6019ae995fe83.pdfIn PDF document text
    • https://senugosuka.weebly.com/uploads/1/3/1/4/131454109/bevilebivifa_xejij_fesopesomemuj_sisezokebura.pdfIn PDF document text
    • https://tapinizeguzuj.weebly.com/uploads/1/3/4/4/134456840/memiweruvugozika.pdfIn PDF document text
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/8a5f28457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417318/normal_600f0354113cd.pdfIn PDF document text
    • https://mogomanazeveka.weebly.com/uploads/1/3/0/9/130969503/668bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455876/normal_5fd85a179cb45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383802/normal_5fc87c0fde8de.pdfIn PDF document text
    • https://rapelolizoxofi.weebly.com/uploads/1/3/1/3/131381924/16ccc9e3af6f7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://welomobo.pbworks.com/f/clifford_the_big_red_dog_books.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/w/file/fetch/144658482/standar_auditing_aaoifi.pdfIn PDF document text
    • http://degagogo.pbworks.com/w/file/fetch/144586884/togareja.pdfIn PDF document text
    • http://magobok.pbworks.com/w/file/fetch/144792540/how_to_set_an_rca_universal_remote.pdfIn PDF document text
    • http://vuxoris.pbworks.com/f/65517060048.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/w/file/fetch/144943329/6797729928.pdfIn PDF document text
    • http://rezedul.pbworks.com/f/bangla_film_manik.pdfIn PDF document text
    • http://gutupum.pbworks.com/f/chemistry_lab_manual_class_12_free_download.pdfIn PDF document text
    • http://naxenuve.pbworks.com/f/hill_climbing_racing_2_download.pdfIn PDF document text
    • http://newubotadov.pbworks.com/w/file/fetch/144877128/mr_peabody_and_sherman_full_movie_in_hindi_download.pdfIn PDF document text
    • http://katexawa.pbworks.com/w/file/fetch/144874704/76004633359.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_off0000fe82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE82 5188 bytes
SHA-256: 1a6c1f32f6fb3266e6c38dfc10b818304950e1a8d8e4fa60defc68e688e39303
font_01_sfnt_off00011010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11010 11224 bytes
SHA-256: b3422851adf176ff9810aebcddd3191b4332918160da36db7445255ca0ec17db

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