Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fabd3fec5f3bc50…

MALICIOUS

PDF

76.9 KB Created: 2021-02-14 17:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4cac2f9ec2f90b7da71e0582b26f2a6c SHA-1: 0e453242f0deb78e6939b79804930f363f0f69a0 SHA-256: 6fabd3fec5f3bc50d38b80e463f9fe48fdf25c4a37bcb47420eb1351e93b191f
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document is designed to host many links on potentially untrusted hosting. While no scripts were explicitly extracted, the nature of PDF malware often involves JavaScript for exploitation or redirection.

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://druttle.ru/wb?keyword=mobilith%20shc%20pm%20460%20datasheet PDF link annotation
    • http://powerhdniy.space/2017_eeo-_1_report_template2pwmw.pdfIn PDF document text
    • http://pedrons.space/2247440714xg3yw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_6014b97eda209.pdfIn PDF document text
    • http://werenntaq.online/chhattisgarhi_comedy_ramu_yadavlkwlj.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/answer_key_2019_upsc_csat2qpcr.pdfIn PDF document text
    • http://xijafagupigor.22web.org/bajoloxoxilozi.pdfIn PDF document text
    • http://donbetosstreettacos.com/19778254782q5nxs.pdfIn PDF document text
    • http://marketeuro.pro/free_editable_minnie_mouse_birthday_invitation_templatessf8f3.pdfIn PDF document text
    • http://dvigatel.guru/lenovo_x1_carbon_5th_genqnpa4.pdfIn PDF document text
    • http://bionatur.space/xilenez51g3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501998/normal_6015ca4494084.pdfIn PDF document text
    • http://tetuzat.22web.org/papegafa.pdfIn PDF document text
    • http://xugerovogubex.22web.org/new_tds_challan_281_in_excel_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412583/normal_5fd3928ea5c96.pdfIn PDF document text
    • http://zowisofefo.iblogger.org/regupusurinajud.pdfIn PDF document text
    • http://mybestchan.online/muvuxumemejupisipoht0ya.pdfIn PDF document text
    • http://summerita.fun/wasetamaxaxapazafaxawejatblyb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484812/normal_5fc87e38ae826.pdfIn PDF document text
    • http://everydays.space/66626935871wpmqp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fetewuzapozoza.rf.gd/17092722360.pdfIn PDF document text
    • http://pikegasek.epizy.com/british_passport_application_form_c1.pdfIn PDF document text
    • http://sarososibi.rf.gd/docker_installer_for_windows_7.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_off0000ed3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3C 5748 bytes
SHA-256: 4fbbabe24387ca1ffd5234637850da0e744cf22f79373a4b93b1249f9a1dca21
font_01_sfnt_off000100af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 10960 bytes
SHA-256: bae007968e318c42da932ccdfab701e4d82918888f978b77725dcab31cf0d882

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