Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e020fb98c2ded4c…

MALICIOUS

PDF

81.9 KB Created: 2021-09-12 01:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c889f56d5a1ad25d8f4365d442d25103 SHA-1: 7ce141743589dda8edd194b7496539fd1e2ce06a SHA-256: 7e020fb98c2ded4c79d447f5dcadc6b61e2eec2decb56953dcdcc3d071efbb33
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, with one heuristic specifically flagging it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is likely used to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161398c4f7f96d---1482799631.pdf In PDF document text
    • http://humanitool.ru/userfiles/file/58941663397.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/luzegulusu.pdfIn PDF document text
    • http://longbienco.com/js/ckfinder/userfiles/files/47038320770.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/82775014785.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/20045690251.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613281dd67a27---wisugubisejewisir.pdfIn PDF document text
    • http://dar-tom.pl/userfiles/file/66502193331.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/35150704482.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/xolusi.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/dalojujev.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/393610364.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/xukipewo.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32635813479.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/repanakudoxepevi.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/gewovulikidetapaka.pdfIn PDF document text
    • https://pcetravel.com/files/file/nigufu.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/liwogopuwebesupusojotuno.pdfIn PDF document text
    • http://pate4me.com/userfiles/file/tipugiwiv.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/66608818406.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/15611163568.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/vazab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=mumbai+saga+movie+download+1080pPDF 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_off0000db3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3A 17256 bytes
SHA-256: 89375dfa662bf8463c8df4b45abc743215fffcad9cb457700e6b16659e978e9e
font_01_sfnt_off00010803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10803 11304 bytes
SHA-256: c0367f06ebc4d0b1f54026127df91633f78e33ba9bb8147f37245828bd338e42
font_02_sfnt_off00012235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12235 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1