Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f429560786a334…

MALICIOUS

PDF

75.3 KB Created: 2021-02-19 10:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6f80cbe0c36add096a67c39757941ed3 SHA-1: 67f4063f24148286bb57a0a21c38541f14ed1b17 SHA-256: d4f429560786a334979b9fca7f53436314e63241cc0689d30c65117335419c63
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though truncated, contains references to 'Fl studio 12 old version free download' and the authoring application 'wkhtmltopdf', suggesting a lure for potentially unwanted software. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or malware distribution scheme.

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
  • 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://jacksth.ru/123?utm_term=fl+studio+12+old+version+free+download PDF link annotation
    • http://goodnaturak.space/big_data_book_free_downloadpnoal.pdfIn PDF document text
    • http://lovemecompletely.com/78526765944xhjed.pdfIn PDF document text
    • http://pro-komp-master.website/100550101v88j3.pdfIn PDF document text
    • http://segwaywheelchair.ru/minecraft_skin_name1ldcw.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/bM4iaqo/3886575772.pdfIn PDF document text
    • http://naturalik.fun/irregularity_report_meaningms0l5.pdfIn PDF document text
    • https://cdn.sqhk.co/vekosozob/ig9ijQg/kick_the_buddy_forever_apk_android_oyun_club.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481540/normal_602d2d5de7370.pdfIn PDF document text
    • https://cdn.sqhk.co/xewimoziwuvo/Z1n8QtW/bubble_tea_kit_for_home.pdfIn PDF document text
    • http://com-signto2.xyz/murepuzaxofiwccx.pdfIn PDF document text
    • https://cdn.sqhk.co/samofetob/MsQiahf/lilijejo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fokafupu.rf.gd/79493213290.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/certis_access_ios.pdfIn PDF document text
    • http://gozozofufeb.rf.gd/aapt2_error_check_logs_for_details_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/whatsapp_for_pc_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/more_than_and_less_than_symbols_worksheet.pdfIn PDF document text
    • http://sekijipaladi.epizy.com/lokamifimarikolilokefan.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_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 5192 bytes
SHA-256: e18998d705ca4205dd79325635f102565ac10276d4dab38f5f57ff4150152cfd
font_01_sfnt_off0000fba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 10620 bytes
SHA-256: c9dc91b4cee5b39b7916a451bea0dbfc191095e1f6e6ff39b0b89b02aac9af30

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