Malicious PDF — malware analysis report

Static analysis result for SHA-256 282e48b379f57b35…

MALICIOUS

PDF

79.8 KB Created: 2021-04-04 12:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1dc3bcc41905b08fb9917ec1626dc648 SHA-1: 17977e9c1763c22bd8d6aa9b594a86cef0bd9b28 SHA-256: 282e48b379f57b3575499d565a59363cb80584b7a84c677b86397751008f2af1
186 Risk Score

Malware Insights

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

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 0.9997

Heuristics 6

  • 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
  • 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://xezojetit.ru/strik?utm_term=maytag+portable+dishwasher+faucet+connector PDF link annotation
    • https://guwifanifinib.weebly.com/uploads/1/3/2/7/132740319/gefevafuzuzipep-samamelari-luvaverut-panukeginoz.pdfIn PDF document text
    • http://gujufifirisin.22web.org/70291627197.pdfIn PDF document text
    • https://xenizejaruwew.weebly.com/uploads/1/3/4/7/134709329/1752902.pdfIn PDF document text
    • https://budawimimizav.weebly.com/uploads/1/3/0/8/130873912/fojav_gelanov_kamevimigipi_falobesolopo.pdfIn PDF document text
    • http://magonawaneku.22web.org/surah_baqarah_in_english.pdfIn PDF document text
    • http://zewikeb.iblogger.org/kadesakevikinodasen.pdfIn PDF document text
    • https://kaxalosenawa.weebly.com/uploads/1/3/4/5/134576513/norisejezu.pdfIn PDF document text
    • https://wazurewimi.weebly.com/uploads/1/3/4/5/134598950/sedubesupomesaritup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_687495e4312343a184de5d9cfc3cd322.pdf?index=trueIn PDF document text
    • http://nipufafinera.epizy.com/55177907469.pdfIn PDF document text
    • https://baad1762-ad72-434c-be9a-9de7d8068d01.filesusr.com/ugd/61395f_2cab5105c1d6414da9c5aee278ba1357.pdf?index=trueIn PDF document text
    • http://gesubonepalit.epizy.com/89007040884.pdfIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_9d4006c1d09a481e9c34c528263e02a1.pdf?index=trueIn PDF document text
    • http://nakewifowid.rf.gd/lozenuxodetuviw.pdfIn PDF document text
    • http://jejofasur.rf.gd/ethnocentrisme_definition.pdfIn PDF document text
    • http://morubinubifo.epizy.com/behold_our_god_acapella_sheet_music.pdfIn PDF document text
    • https://a867a740-3546-49c9-bb92-c76f735cad7e.filesusr.com/ugd/c312ff_cc878beae4cb4bbabba63976d4b1b35a.pdf?index=trueIn PDF document text
    • http://sejekaxupoze.epizy.com/zorebudiwojuvep.pdfIn PDF document text
    • http://dopelafoxumamew.rf.gd/63228377191.pdfIn PDF document text
    • http://juvegebufu.epizy.com/driver_brother_2701dw.pdfIn PDF document text
    • http://dixolasafu.epizy.com/simasegukapewinoz.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_off0000fa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA51 5756 bytes
SHA-256: 83edc029fe9cd784ad7ca059e74eab5ee2752a9796b8b5d6f92307a9c3244db2
font_01_sfnt_off00010e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E07 10504 bytes
SHA-256: fe2a62c0f92993f943ddd4b62cf2a1b2aa4b8b6a42b5a65e135947893e588886