Malicious PDF — malware analysis report

Static analysis result for SHA-256 47627fd0bdb34bb2…

MALICIOUS

PDF

81.2 KB Created: 2021-09-08 12:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 94236a1288f888c40ce968a5fecd1d42 SHA-1: be04ee0fae499ae614c1bea8dd574d09759bb7d9 SHA-256: 47627fd0bdb34bb2251c0ccc2b3f1e9b87757519758aaf4d2afe687f5f378229
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for exploiting PDF vulnerabilities or redirecting users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of external links, suggesting a phishing or content-farming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tuttotop.com/userfiles/files/13153545777.pdf In PDF document text
    • http://bobas24.pl/Upload/file/94318404703.pdfIn PDF document text
    • https://adikkedua.com/contents/files/nopirowopakijebevanifu.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/wifugunon.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/tusawezujutafuzewebil.pdfIn PDF document text
    • http://espicycooking.com/files/file///41494906343.pdfIn PDF document text
    • https://uslugiinzynierskie.com/eurostyl/photos/file/gawixidamexulutex.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/dusivuges.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/58405183664.pdfIn PDF document text
    • https://seikai.jp/free_images/files/79354510369.pdfIn PDF document text
    • http://thongthien.vn/upload/files/webibelusozufeme.pdfIn PDF document text
    • http://budropol.de/Upload/file/11064304295.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/27718693702.pdfIn PDF document text
    • https://totspotdaynursery.co.uk/ckfinder/userfiles/files/kovotabe.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/muxaselasijamo.pdfIn PDF document text
    • http://trungtamdaykem.vn/Images_upload/files/19977218879.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/data/editor/file/dubadatepuxonifimovuk.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/53190352067.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/ravegomijaju.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/44910345840.pdfIn PDF document text
    • https://betsin.org/userfiles/files/saxubo.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/50024455748.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/63627117734.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/mijekatufolepide.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/43956122408.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=factorizacion+ejemplos+pdfPDF 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_off0000d38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA6 10948 bytes
SHA-256: 037c572c804d15aee6440d71c797e913dc20795f6ab3b4801fdc493fb30e6e8c
font_02_sfnt_off000104ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FF 19280 bytes
SHA-256: 7e23691268506f4c9330227d27dfcbe2f2cf897135d93e0dc52d0b353c8a21f1

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