Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be5faac354cdecf…

MALICIOUS

PDF

74.5 KB Created: 2021-06-09 03:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c78b0193688f79054da42ddae0abb54d SHA-1: 044e54aed852d8c76e7c1d4eb04a6ea909627b7c SHA-256: 1be5faac354cdecf42277620d20fc98c70c5554c777b3e0cc9140e5970fa4e8c
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, specifically as a phishing trojan. It contains an embedded URI pointing to 'pistant.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a legitimate download. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pistant.ru/pbw?utm_term=harry+potter+in+the+deathly+hallows PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490949/normal_6065e5a44361a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414868/normal_6041a069e589a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476010/normal_60be7c59b5176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421970/normal_605e072ddb4e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444104/normal_601fbe4358895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481056/normal_6063f48dbaa60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485162/normal_6009f279b1d47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a8c8717-1752-4e0c-aed5-64f5e05204f3/17029732120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9373af0-8494-458b-82a9-e5aa9a307e6b/abstract_reasoning_questions_and_answers_free_download.pdfIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144577515/crappie_fishing_lake_guntersville_in_april.pdfIn PDF document text
    • http://gozuwef.pbworks.com/w/file/fetch/144810957/stormbreaker_template.pdfIn PDF document text
    • http://polujare.pbworks.com/f/21604785021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aae5682-c88b-4a90-8f2d-c6b2e957e89c/68993644698.pdfIn PDF document text
    • http://fipivuzigoge.pbworks.com/f/gaduvuvaleduzijukerilol.pdfIn PDF document text
    • http://fuzujufod.pbworks.com/w/file/fetch/144663282/90224700792.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/w/file/fetch/144905178/noxar.pdfIn PDF document text
    • http://xefobukeza.pbworks.com/w/file/fetch/144608385/what_to_put_for_server_on_resume.pdfIn PDF document text
    • http://tewabavuxate.pbworks.com/f/3276305865.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_off0000e610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE610 5200 bytes
SHA-256: 041113addd0a7a779c9d372696efee79023203c339fcce4d811659b2ce246dfb
font_01_sfnt_off0000f7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CF 10984 bytes
SHA-256: d8a302f680e6b2b4b50e6954c121e4817e3be68ca60b08f4551d06bda590b010

Open this report in the interactive analyzer, or submit your own file for analysis.