Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d8282437599ae4…

MALICIOUS

PDF

64.0 KB Created: 2021-03-04 16:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2e72df7cd19385c0fcc4295967a439f1 SHA-1: 8e9da9a78e1e04d68593a5317075b2b19b0c0a93 SHA-256: a9d8282437599ae4bce2f792a9bbf5906d40a1d22812d34cb37d026db85b4629
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8428

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://mezovuduw.ru/award?keyword=dell+1320c+driver+for+windows+10 PDF link annotation
    • http://nesorus.mywebcommunity.org/dogotuzudanamegu.pdfIn PDF document text
    • https://zedebofewel.weebly.com/uploads/1/3/4/5/134594015/gadorado.pdfIn PDF document text
    • https://zelelifejoba.weebly.com/uploads/1/3/4/3/134321633/2121964.pdfIn PDF document text
    • https://lividuxu.weebly.com/uploads/1/3/4/3/134354071/basaw.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/PjhmO7U/word_jumble_cheat_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kenalexuvexu/620jhkL/34430143493.pdfIn PDF document text
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/9520806.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/gitudijofuta.pdfIn PDF document text
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/mobejuwedarobinitu.pdfIn PDF document text
    • https://cdn.sqhk.co/bikulatitaxe/tsgfXW9/tetris_effect_steam_controller.pdfIn PDF document text
    • http://noruzugakad.22web.org/nimosefunituk.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/44501638365.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/1GMgdGi/21779132005.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/hgegchk/bupoxukamuvase.pdfIn PDF document text
    • https://xasopivuzag.weebly.com/uploads/1/3/5/3/135333163/mulilegaba.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/jfiehDU/siwefodivoveku.pdfIn PDF document text
    • https://rojaduvesasesa.weebly.com/uploads/1/3/4/7/134751848/1825598.pdfIn PDF document text
    • https://xutezanepone.weebly.com/uploads/1/3/3/9/133999331/d620b4cda9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiwozoma.epizy.com/battlefield_4_multiplayer_pc_free.pdfIn PDF document text
    • http://boxokur.epizy.com/interactive_reports_in_sap_abap_example.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_off0000e5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CB 5448 bytes
SHA-256: f61cd4a2c5fd272b50a06ddda257051839cff8f25f939a2af397f6aeae8c856b

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