Malicious PDF — malware analysis report

Static analysis result for SHA-256 430fd80fe8dc20d8…

MALICIOUS

PDF

71.5 KB Created: 2021-02-13 23:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fbe65972f75dd104ef1d1d84b007110c SHA-1: 558854208e3b2e85f4e082da75582f3eafa5722e SHA-256: 430fd80fe8dc20d8f41693a0b5cfe453d10f2b05e1846b22750bb21f898f7c5b
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to directions, likely intended to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=directions+to+captain%2527s+table+punta+gorda+florida In PDF document text
    • https://static.s123-cdn-static.com/uploads/4408875/normal_6002538f56f2b.pdfIn PDF document text
    • https://cdn.sqhk.co/fusunejevawu/ivgdjdJ/32542960164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420939/normal_60209a92941aa.pdfIn PDF document text
    • http://wunedefewadonif.22web.org/chidambaram_pillai_photo.pdfIn PDF document text
    • http://wumijodurixemi.22web.org/87355233025.pdfIn PDF document text
    • http://youralteragoods.com/481622386233n83h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457843/normal_600c506f5c54b.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/2Trjcjj/zipotumi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480585/normal_5fe31c6fdf199.pdfIn PDF document text
    • http://atomlinux.com/rounding_off_whole_numbers_worksheets_for_grade_5stcx9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_601ffc96ed1cc.pdfIn PDF document text
    • http://detonic-buy.website/need_for_speed_rivals_xbox_one_pricecrwgl.pdfIn PDF document text
    • http://teachersaid.fun/5592867352114i8k.pdfIn PDF document text
    • http://zekoxefol.iblogger.org/quiet_dishwasher_reviews_consumer_reports.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bagurofodi.epizy.com/eular_guidelines_large_vessel_vasculitis.pdfIn PDF document text
    • http://datifuvuk.epizy.com/jizanikoguxaf.pdfIn PDF document text
    • http://bunaziwafifa.epizy.com/forget_you_piano_sheet.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_off0000d9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E3 5496 bytes
SHA-256: b09f7ed2ccee4f93e5f269de368e383bc0473cc62c34d9002f7ff45bc60cb9a4
font_01_sfnt_off0000eca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA6 10364 bytes
SHA-256: f80ca27612b5e9be7bac87eaeb6b84828e8d94e8259c4ed010ba4dd69168f0b1

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