Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e26f555f4c9fd5…

MALICIOUS

PDF

87.8 KB Created: 2021-09-02 12:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0d3f6edca8a35465e10f5adf6cc5f92e SHA-1: 2d0b2f3d1847552f75d74ab82dccfb35dfb1040f SHA-256: 60e26f555f4c9fd58cb4c82480722a109ecacba5813934e72172f3985847e3f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. While no scripts were extracted, the presence of numerous external links suggests an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d05842d07---21577194825.pdf In PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa0d659604---dubalidezabasuvi.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/79769439864.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/vizemo.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/bupomune.pdfIn PDF document text
    • https://amblamy.ee/upload/file/54932973920.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/7f106a78655bb87ffbacd417f59fe9ed/69168876689.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/e91593a80d1408a7e2b3586aa2a77a7a/14809927884.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/nevoraratesufozitam.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/37627141781.pdfIn PDF document text
    • http://esistore.de/userfiles/file/bibixotogaxu.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/devofobukerabapedizab.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/sufanoset.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/figubopi.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/98244373705.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/2amjoqfup4rlen7ld28uq9lhnv/39512503724.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/legozodu.pdfIn PDF document text
    • https://shiokuda2.com/contents//files/metebadiwepenizuto.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/mubuvezufitalilino.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/kawegokadototuladixum.pdfIn PDF document text
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c894ea877b---tifusugojevefekisadilewal.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/91d8ff161770fb7416f0932dafdead5f/5853931765.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/tvkl2920d2tfmhaq5b19kf6lra/givoxeminamuk.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/08af168b1b0ea18d4438ff633bd5b1d4/tizirumunagibuvuwidep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=cogni%C3%A7%C3%A3o+humana+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_off0000ece1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE1 20072 bytes
SHA-256: 4babbc94466033b6c65ed9e0f2d691bf279c38c6d67eded954d60c9b55a7240e
font_01_sfnt_off00011ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE1 10996 bytes
SHA-256: 9b14c93d320a9f7a1110c75c4c18538bcb425ca2409f38d19994f13408dd8bb3
font_02_sfnt_off0001379b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1379B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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