Malicious PDF — malware analysis report

Static analysis result for SHA-256 7257dceac4741870…

MALICIOUS

PDF

66.6 KB Created: 2021-01-26 17:36:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 44c85dcd35febd77852d6e767c165cd8 SHA-1: fcdb095d24fe776ee27b6c0c12a62a1fc3e37265 SHA-256: 7257dceac4741870bf6ee45c454c02400f4dd9b03a07be55941953b8ced9c00b
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the link farm heuristic point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8546

Heuristics 4

  • 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
  • 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://leonvi.ru/aws?utm_term=ayushman+bharat+beneficiary+list PDF link annotation
    • https://xesuxikoju.weebly.com/uploads/1/3/4/0/134095833/berisofum-fisuze-punotalosibaxem-kibawofowujud.pdfIn PDF document text
    • http://topijakalez.22web.org/custodial_worker_1_test_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/gjcb5tX/vefokufexonolirit.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/kutukogasegojijeb.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/VFqhaZL/champions_hockey_league_semi_finals.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/gRVK1id/28164973908.pdfIn PDF document text
    • https://riwewupurudo.weebly.com/uploads/1/3/1/3/131381540/533cbb.pdfIn PDF document text
    • http://mosoxiliraf.iblogger.org/reporting_two_way_anova_results_spss.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/gc27dgd/unicorn_dash_magical_run_uptodown.pdfIn PDF document text
    • http://suxiselukex.66ghz.com/vidmate_old_version_for_android_free.pdfIn PDF document text
    • https://dizufarul.weebly.com/uploads/1/3/1/3/131379939/4072825.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/tufujifinobiro/jilaj.pdfIn PDF document text
    • http://kewugozosefo.epizy.com/tatalaksana_meningitis_tb.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/20436143646.pdfIn PDF document text
    • http://wojudor.epizy.com/69548634439.pdfIn PDF document text
    • http://wofukisunoxo.epizy.com/eschooltoday._com_natural_resources_worksheet.pdfIn PDF document text
    • http://namutogenasokab.epizy.com/mabegaveti.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_off0000e89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89D 5352 bytes
SHA-256: 94052a01dca33c8e466306efefbd016eb8fc086cddfbc0a06361b2610ad37078