Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d44374df0189d6…

MALICIOUS

PDF

70.9 KB Created: 2021-03-05 12:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bd8c3309d881dddc8b3c0d793b2727e9 SHA-1: e62ec0ad66a80b8bef7dbb0b40616dca8da05071 SHA-256: c3d44374df0189d6bdc611bbe5da20af716ddf8a2f76db44d0b6c2a5a9b27218
124 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The document body, though heavily obfuscated, contains keywords related to stock apps and iPhone, likely intended to attract search engine traffic. The presence of numerous external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

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.
  • 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
  • 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/award?keyword=what+is+the+best+stock+app+for+iphone PDF link annotation
    • http://fukiwurezopukof.mywebcommunity.org/los_amantes_del_circulo_polar_pelicula_completa.pdfIn PDF document text
    • https://rupilobeva.weebly.com/uploads/1/3/0/7/130775598/susafude-mamiz.pdfIn PDF document text
    • https://giwuvapelefawi.weebly.com/uploads/1/3/4/8/134869604/xobasigukozuzikimazu.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/butosikowalozirujenaluf.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/37334861.pdfIn PDF document text
    • https://sebeguresed.weebly.com/uploads/1/3/5/9/135966133/nofotere-jikuxowisowov-taxunavukuf.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/what_anime_is_one_punch_man_from.pdfIn PDF document text
    • https://degevibuv.weebly.com/uploads/1/3/5/3/135316410/8657323.pdfIn PDF document text
    • https://bidijewufamidu.weebly.com/uploads/1/3/5/3/135325384/tulonazosavi_supigese.pdfIn PDF document text
    • https://tewijudejasivi.weebly.com/uploads/1/3/2/6/132682467/6775229.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/how_to_thread_bobbin_on_singer_simple.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_d3d755a3bb114fa9a466bd74b46d234d.pdf?index=trueIn PDF document text
    • http://luvebex.rf.gd/xakurakivo.pdfIn PDF document text
    • http://rixigor.onlinewebshop.net/web_services_for_dummies.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_90c34ffc1eeb45fb9cad61b4659c3157.pdf?index=trueIn PDF document text
    • http://pekuvem.epizy.com/bukiropadutozamubosuto.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF274 5288 bytes
SHA-256: 335d2de8a746cfe52877e558a055e785c2476fa670ace6ce75ecf39bdac3ee1a