Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e198cf11b83f4d5…

MALICIOUS

PDF

71.0 KB Created: 2021-02-23 07:34:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5290577d39f32062882ee80057f7ff90 SHA-1: ddebb89174dc347d84ea9cc3f27d65cf0cf0187a SHA-256: 5e198cf11b83f4d59a752b0f4fb21a99eeba776652168b4c85bf9a1e22c90f14
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating it's a phishing lure related to 'real ID' requirements. The embedded URL, 'https://leonvi.ru/strik?utm_term=what+documents+do+i+need+for+real+id+in+nj', is presented as a link for downloading related documents, which is a common social engineering tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/strik?utm_term=what+documents+do+i+need+for+real+id+in+nj PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5fc9ef8c3f435.pdfIn PDF document text
    • http://daxosivonoz.iblogger.org/stages_of_language_acquisition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448535/normal_5fdc0485e491c.pdfIn PDF document text
    • http://dujadesixozubi.22web.org/4079649717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412570/normal_5fd2d8d054827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529024/normal_5fef67c3e4eeb.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/ii8jbja/twitter_video_download_iphone_camera_roll.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5fcee16def6f6.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/pujirageg/flu_guidelines_tamiflu.pdfIn PDF document text
    • http://niwuzowebod.epizy.com/baseball_fielding_drills.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/bleacher_report_2017_nba_redraft.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/93917236549.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/beginners_guide_to_gym_workouts.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/uc_browser_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/92915235151.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/bumodavovetefawotem.pdfIn PDF document text
    • http://pakafadudu.epizy.com/juxijififa.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A9 5352 bytes
SHA-256: 487fac447a13aca787468c72be61b7970e24c28cc0386ec4135ae531df91ed20
font_01_sfnt_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 10308 bytes
SHA-256: 7d32bbcb938ef01a29dec7e37b405837adb7f56cf2bf1d37c24178fe601b814d

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