Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9298d1f2870d53b…

MALICIOUS

PDF

72.5 KB Created: 2021-04-17 09:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8016729ed5f44f36ef3b9f9c871b2693 SHA-1: 73df9e7bd82088f8ceefc173e6166355c77b5a2e SHA-256: e9298d1f2870d53be771cc8ecf06960855ed49285da59d01dd0b07f93641bac3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable or unknown hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic strongly support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 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://bologen.ru/strik?utm_term=brother+pt-1290+tape+refill PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422144/normal_604372f40da37.pdfIn PDF document text
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/sogasanufuvaja_jilexugigotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527108/normal_60480ecf11df5.pdfIn PDF document text
    • https://nolujamikudaze.weebly.com/uploads/1/3/4/8/134868466/suvozebe.pdfIn PDF document text
    • https://porojole.weebly.com/uploads/1/3/4/4/134462866/5600540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503787/normal_602e38c54781a.pdfIn PDF document text
    • http://vulifux.66ghz.com/regefofimunubumejemeriduf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_60400b49f0309.pdfIn PDF document text
    • http://rokonagusedat.22web.org/introduction_to_technical_analysis_martin_pring_free_download.pdfIn PDF document text
    • https://sirazetagur.weebly.com/uploads/1/3/5/3/135328448/3430532.pdfIn PDF document text
    • https://gadujixefanupu.weebly.com/uploads/1/3/1/1/131163635/fozoweve-vakowuvivuwunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403689/normal_606910203f901.pdfIn PDF document text
    • http://nuxaxupijejuz.iblogger.org/77379263773.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/silubebebefuju/kprc_traffic_reporter.pdfIn PDF document text
    • http://satoposip.epizy.com/aoc_27_inch_monitor_manual.pdfIn PDF document text
    • http://kajutudem.epizy.com/amblyomma_variegatum.pdfIn PDF document text
    • http://zulalef.rf.gd/17849893133.pdfIn PDF document text
    • http://supisaminuwon.rf.gd/gudirojalidebetotar.pdfIn PDF document text
    • http://wilazetifoka.epizy.com/jofopaginiba.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/how_to_calculate_net_cash_flow_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/kofasarokeluwemubakat.pdfIn PDF document text
    • http://binasizula.rf.gd/acute_lymphoblastic_leukemia_treatment_guidelines.pdfIn PDF document text
    • http://nelekilegel.epizy.com/why_does_my_printer_not_recognize_my_ink_cartridge.pdfIn PDF document text
    • http://zejuruk.rf.gd/69107514891.pdfIn PDF document text
    • http://lokemuwebofeg.rf.gd/mercer_salary_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/peladobekevakiluviliroro.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/microsoft_access_2013_full.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_off0000dcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF4 5372 bytes
SHA-256: 6615fefad71e07ecbe611325289769356d04365b6bbb332f85e81d0b6a93b64c
font_01_sfnt_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 10896 bytes
SHA-256: 500a45241ca1d7c25237f0d349454517d6548f20904d03d5e5b2e5280fbe0a96

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