Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff090e6b1c3540b6…

MALICIOUS

PDF

79.9 KB Created: 2021-09-09 13:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9b7c5ab601bfeafcf262d10e0b331057 SHA-1: 1b485147342194ee6302007dfc16f53e1a31647a SHA-256: ff090e6b1c3540b6a62a629a6c9f9b4e79361648394283d9125e7b7ff13ccb01
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links to various domains, forming a link farm, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of hosting disposable links, and the presence of a FIFA Online APK lure suggests a phishing or malware distribution attempt. No scripts were extracted, but the structure and heuristics strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://luluscafeonline.com/uploads/files/potelenapuponuvoj.pdf In PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/pakiterujeximag.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/nelopuxolezubumaguwo.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/64890141627.pdfIn PDF document text
    • http://blccy.com/userfiles/files/72642544078.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/7653378338.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/natibazixofe.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/43278227641.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/weluzopivopogerebemupelu.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/bufasitoxukuda.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/57611167252.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/bizudexuf.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/silavadozefasisasa.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/25396858106.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/61564200696.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/psvhvn0jvbacqgd6oto0s4smbr/13099628710.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/bekanusatinul.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/3820143467.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/dopakaxiwobibekibuvilijo.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/64313775729.pdfIn PDF document text
    • http://acelybio.com/upload/files/piritazesigetafoxuwim.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/bubapafo.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/70704906102.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/gupipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=fifa+online+apkPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE732 10056 bytes
SHA-256: 624b77572f5ca175130d23ed17aaaf4b6a1bb795c0e67289dcdfb52f23cbd4f7
font_02_sfnt_off0000fd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8F 20000 bytes
SHA-256: 7df9d0f22f52edbfaa1092f191167f28c1bd5326da433cc25f1a0bbaf44676ac