Malicious PDF — malware analysis report

Static analysis result for SHA-256 8344ef539adf3164…

MALICIOUS

PDF

71.2 KB Created: 2021-04-27 13:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8d5b9dfa28992629752aae955ce9816a SHA-1: 179417194ddfe773df746bd2c1baf31ae6b193ed SHA-256: 8344ef539adf3164246993602a38a3e2c87f2f622b5ca09e32f90b4ad5d44931
184 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9572

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.
  • 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://dugedepap.ru/strik?utm_term=inorganic+chemistry+topics+pdf PDF link annotation
    • http://joxezorov.mywebcommunity.org/79293148607.pdfIn PDF document text
    • https://belanuxaru.weebly.com/uploads/1/3/4/6/134670531/30437.pdfIn PDF document text
    • https://jimepozuzaz.weebly.com/uploads/1/3/5/3/135350414/lurogo-dogadogum-zapajepunulibir-jipafepegovofop.pdfIn PDF document text
    • https://bifawodeg.weebly.com/uploads/1/3/5/3/135348479/raruziwinejo.pdfIn PDF document text
    • http://zuxenegobepejij.22web.org/how_to_understand_trading_stocks_online.pdfIn PDF document text
    • http://pozugazibejiku.iblogger.org/bamusalufetosonete.pdfIn PDF document text
    • http://kisuvok.scienceontheweb.net/jaladu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73808e0e-d5df-4584-b63e-1552d949bc0c.filesusr.com/ugd/8d2ea6_bdcf001ff5ea4aedb78e617a0b874e46.pdf?index=trueIn PDF document text
    • http://deberap.epizy.com/pdf_ccna_routing_and_switching_200_125_official_cert_guide_library.pdfIn PDF document text
    • http://kinuvafarugabob.rf.gd/akreditasi_puskesmas_bab_4.pdfIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_b9ff65376a224fe8b37ff0e411316938.pdf?index=trueIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_aa7ad658f55e44f49e1cce4305df2dc7.pdf?index=trueIn PDF document text
    • https://108bb973-5399-4bf7-a70e-a18780752cac.filesusr.com/ugd/760a88_21b9377754514cf184b6b57f51c50dac.pdf?index=trueIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_8de38955efb94a7b9376b950ef2f7234.pdf?index=trueIn PDF document text
    • http://sewoxoxitif.rf.gd/6983107126.pdfIn PDF document text
    • https://a909b8fe-7c6e-4467-a5b6-92e64a2a5b5d.filesusr.com/ugd/65efca_9e80901fb3f14907b620b0898e3bd207.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_56872b3ae8a54bb2956d804e13b20ad8.pdf?index=trueIn PDF document text
    • http://nexaware.epizy.com/zijobunalusawutisufi.pdfIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_2649b3601e854d13a19aacade7a31879.pdf?index=trueIn PDF document text
    • http://totajenu.epizy.com/civ_5_culture_victory_guide_vanilla.pdfIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/dabufivususoludaje.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_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 5576 bytes
SHA-256: 9bc143b6145eea2898b8066b21584d510df633d3e4e2cefb699c346149c8722d

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