Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbe8c4bdfd29cd3…

MALICIOUS

PDF

76.9 KB Created: 2021-03-15 06:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8241f365a3270805ebd6711aeb19bab6 SHA-1: 50b122634fb9b773eefa63c81b25afe5a11ff7f1 SHA-256: 3dbe8c4bdfd29cd397dbfed4244d459936e3dfd26492d01c870730eccf1bd3e8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://pelibifir.ru/strik?utm_term=sandisk+clip+sport+plus+itunes PDF link annotation
    • http://smartycredit.info/centos_linux_commands_with_examplesll96y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383322/normal_5fcea4016a038.pdfIn PDF document text
    • http://medtechnika1.ru/best_sims_3_store_setsghd6k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408719/normal_60282bd832f06.pdfIn PDF document text
    • https://vijunefuk.weebly.com/uploads/1/3/4/5/134588972/89239f4b87c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473432/normal_6035370c5616f.pdfIn PDF document text
    • http://hot-money.fun/mercy_by_brett_youngdyr2o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_600c6db7643f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5fc74f6911a96.pdfIn PDF document text
    • https://bakogala.weebly.com/uploads/1/3/1/3/131384254/safisakemaf-vukosakebozas.pdfIn PDF document text
    • https://xelixexojiga.weebly.com/uploads/1/3/4/1/134108676/sitaxubof_getawatawegox_xajakebedu_rafilisudaj.pdfIn PDF document text
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/mojejafaz.pdfIn PDF document text
    • https://buzixigadojaw.weebly.com/uploads/1/3/5/3/135316262/5656134.pdfIn PDF document text
    • http://bupro.asia/wimilutomepuki4m29a.pdfIn PDF document text
    • https://rifubagozoj.weebly.com/uploads/1/3/2/6/132695416/ritatemeravaj.pdfIn PDF document text
    • https://gibetixogi.weebly.com/uploads/1/3/1/6/131636946/xajure-luwufo-bariliku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_602da7292542c.pdfIn PDF document text
    • http://santand-es.com/ac600_wifi_adapter_driverbf88i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451365/normal_5ff5f99d34cb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477638/normal_60035fb91613d.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/vetamedisoz/80391496245.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/61313617453.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_off0000eeea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEA 5236 bytes
SHA-256: 7a51bb1fdbe6a5092da0965a222f96641e910c376d567477a7e43c57244d29f0
font_01_sfnt_off000100c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C9 10848 bytes
SHA-256: 99c166b39aec2a41a8ac71bb8ff7b2f74629373e5595f1a08195c4e4a392b937

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