Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb19e1785091b9f…

MALICIOUS

PDF

69.5 KB Created: 2021-03-03 19:20:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 855d34ba1f57ea07d6a4cb81d64532c7 SHA-1: 73d4adfddf385a6afda496bd35a899fe0b28a7fa SHA-256: bfb19e1785091b9fd71875786d9ae985cbacdec1900801f78fdd4eafbfaceb99
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, with at least one pointing to a domain associated with link farming and disposable hosting, suggesting a phishing or malware distribution attempt. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM indicates a deliberate attempt to create a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9709

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://jumiwimov.ru/award?keyword=the+best+fishing+knot+for+braided+line+ever PDF link annotation
    • http://sorifaj.22web.org/39842418419.pdfIn PDF document text
    • http://lobarularexe.iblogger.org/aligarh_movie_300mb.pdfIn PDF document text
    • http://bapefajavijofo.66ghz.com/dazilojomojaroxodumilivam.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/lHqBge9/1620470163.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/jbl_sb400_price_australia.pdfIn PDF document text
    • http://talemine.getenjoyment.net/vipalutolikirun.pdfIn PDF document text
    • http://vinograd.io/aacsb_logo_guidelinesae6lp.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/k3rm9if/bunakawox.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/two_wolves_story_billy_graham.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fidosofesus.rf.gd/bizagi_studio_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/caves_of_qud_tinker_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/fatehabad_weather_report.pdfIn PDF document text
    • http://zojexajori.epizy.com/dimilo.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/57792484166.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/11089391325.pdfIn 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_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 5380 bytes
SHA-256: 134e451e58f043b57f89e18c2c203c7d0d6223423d0f5bc756f217d73f375d20
font_01_sfnt_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 10020 bytes
SHA-256: 447fe217cfec8df70bdb813ff2f5b4735b6e0421c94f39ab5f59e8b728b2c1d4