Malicious PDF — malware analysis report

Static analysis result for SHA-256 147647ff28f72b9d…

MALICIOUS

PDF

77.4 KB Created: 2021-03-02 06:21:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ceda7443886d511c25d5d151ab14c1f7 SHA-1: b54a56b896185990fa6550c7796e48091a79052e SHA-256: 147647ff28f72b9d1ddb8c232f5542e28d45fe6542679ac67fa1c7735981526b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing indicating links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the structure and URL findings suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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
  • 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://yafferge.ru/strik?utm_term=legal+dictionary+apparatus In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_6039d98ea7ccd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503309/normal_5fc5da95e0153.pdfIn PDF document text
    • http://guzolupe.iblogger.org/fakus.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/kudigi-mugiwadekaxemen-sepune-zupinereje.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/f3jg0Aj/vabajenonotolisaviba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_60224f02e81aa.pdfIn PDF document text
    • https://tigasedoxopafu.weebly.com/uploads/1/3/4/7/134707490/5746811.pdfIn PDF document text
    • https://posijakafit.weebly.com/uploads/1/3/5/3/135320461/tabutukubenet_dililot_dagitixojuse_wefod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444386/normal_602e9cf4a6c52.pdfIn PDF document text
    • http://powusonuruw.22web.org/kekagivadoluzom.pdfIn PDF document text
    • https://nuvafuriwevejuf.weebly.com/uploads/1/3/2/8/132814848/turawugodoxiz.pdfIn PDF document text
    • https://tufakuxumiwe.weebly.com/uploads/1/3/1/4/131454237/3571769.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/ihhhijn/bubble_ball_shooter_juego_gratis.pdfIn PDF document text
    • http://fresh-ita.fun/mapa_de_riesgos_la_paz4it0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://junenizexi.epizy.com/noxifuvikogosusixapib.pdfIn PDF document text
    • http://xugowosapiri.rf.gd/lake_havasu_fishing_report_january_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/whirlpool_cabrio_platinum_dryer_stopped_working.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/amana_front_load_washer_error_codes.pdfIn PDF document text
    • http://rixogapokat.epizy.com/15225019531.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_off0000f0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 5284 bytes
SHA-256: a5af5afe161c9934f778840e1859f782a79a7235929d78402f845613928d0039
font_01_sfnt_off00010300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 10884 bytes
SHA-256: f025e01359d1fb5519470806c85848923f20f8baf9f613ae0bd8e9adf7b7e1e3

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