Malicious PDF — malware analysis report

Static analysis result for SHA-256 2966dc0a752d1174…

MALICIOUS

PDF

82.7 KB Created: 2021-09-13 19:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7e35668ec38581c1d88c301602f7d2f8 SHA-1: 1df15cf52fcc42243efbec9ae54905523aa9a783 SHA-256: 2966dc0a752d1174b3738362b96396ab7d478e0cb88514bc7953a79486e5d977
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious PDF files on various domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for distributing malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a673776bb4---40177318115.pdf In PDF document text
    • http://ropesadventure.com/d/files/guxuxukiligegudosepojoj.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/wiludigigabawafelef.pdfIn PDF document text
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/58531372543.pdfIn PDF document text
    • https://pierreseche.fr/userfiles/file/38364524393.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16132595228fb4---zamarerisumex.pdfIn PDF document text
    • https://msiutilities.net/documents/pidisajise.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/woxasewe.pdfIn PDF document text
    • http://pyroglobal.sk/app/webroot/files/userfiles/files/70179347898.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/nejesatudawu.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/bodemumipoj.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/71303485663.pdfIn PDF document text
    • https://bbox.ru/images/shared/file/mutaputuradikogopifem.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/bakob.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/xuzaregiwepazorefamuzik.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/parepowirakekepemafado.pdfIn PDF document text
    • http://unitec-egypt.net/userfiles/file/gukopuwotidiwuge.pdfIn PDF document text
    • http://ldkxzzs.com/images/userfiles/file/bemarefasojuposelu.pdfIn PDF document text
    • https://migger.dk/userimages/file/jixud.pdfIn PDF document text
    • https://jin-hung.com/userfiles/file/pelufozelapavelafinin.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/68812790992.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/121244233453.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/38796765576.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/jixokukuwanosor.pdfIn PDF document text
    • http://rtm-plus.ru/ckfinder/userfiles/files/lawojamero.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=world+famous+offline+gamePDF 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_off0000df35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF35 10692 bytes
SHA-256: 8f0a74ac2666acad6805e326ab461038dfaf47a3de340c3902ee8dbc9623341c
font_01_sfnt_off0000f776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF776 17592 bytes
SHA-256: 579af169642b1d7d811992e2d91121e8642cbecc01a20fcf9d6f1127cf787609
font_02_sfnt_off00012525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12525 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1