Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70161f752d788f7…

MALICIOUS

PDF

80.3 KB Created: 2021-09-21 00:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 13a24a2e056f1aefe67252592baed387 SHA-1: 2663e73c6986236ed3ceed5b1ac0d17f6434a394 SHA-256: e70161f752d788f7bf538223cf1d6ff10756051a554ece365e117cbbb609e8a5
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to distribute malicious files. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure that likely redirects to a malicious download or exploit site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • 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 https://irlanc.ru/uplcv?utm_term=case+battle+mod+apk PDF link annotation
    • https://onderhoudnlgarantie.nl/upload/file/62671252853.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f402b1f930---72441315738.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/63792215478.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/56229199634.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/fodalulirabatorutobi.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613930e5b0cc3---xafatesikunuburovizezuno.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/23260338368.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tudutil.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/28427560627.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202109121846446182.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/60451729092.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/08b945d83c04ce09fea908acfe40e0c5/66788706818.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161330ca3866ce---80489960661.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/6d2173f9d1ca4427c4067d760f80a266/kedukokebipezitodijan.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/40230561836.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/setipof.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/65410097292.pdfIn PDF document text
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/9336403414.pdfIn PDF document text
    • http://i-physiology.ru/upload/kuvome.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/8598456331.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/77147012216.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/55dd243b501615a154828023f39910a3/52500267011.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/84615845888.pdfIn PDF document text
    • 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_off0000d4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECED 18360 bytes
SHA-256: 1666b406c7f852d0cffc8c96939f178e8d3ae3ac05dc369f39763e091bdab451
font_02_sfnt_off00011c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C83 10520 bytes
SHA-256: 87df06d4c995921558b0f4a1c56a2e9ddbbe14ab0e87d857c6684f8587469918

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