Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad61b80a0a0e6b07…

MALICIOUS

PDF

81.0 KB Created: 2021-09-05 10:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 80bb70f9d5b66d3ac5b0626c73745f22 SHA-1: f547619299f5c83f8fdf115052f2483f1effae30 SHA-256: ad61b80a0a0e6b07842219608a16e0e24267f978192db901a66264d5fc77572c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • 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://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dce2faf49c---vodudegepadapavetu.pdf In PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d61793e52c---rejagimamosidijo.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ht3ch13755v3o9vvkrr1vra4il/rufivogevujalivowopixap.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/7654151663.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/miwurawevuviguvefo.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/babogobumek.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/lifidiwex.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/jiwowaru.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/vijawebuzitopo.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/4c1f073b0e8887977785fca0207c0680/woxofebiderabavepaf.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/konuxemu.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/mabesovum.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/xigozejugojipevoriveban.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/xafulazalojowafanigutolu.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/71144779199.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/56384711541.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/62874192855.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cce16bb40---9756111527.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/47428266799.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/r396l98q21jg54834e0mpt5dkk/54002767300.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/30960416115.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/64821426041.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=convert+pdf+to+html5+javascriptPDF 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_off0000d37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37E 18400 bytes
SHA-256: 3e0bb9eac68ac253ffb62eb012e201efca0ecfb2a675ff8a6570329c6eae82d1
font_01_sfnt_off00010459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10459 11244 bytes
SHA-256: 608178712bd3795544d97b59ddccd640aea37013d9ab4526657b0b80075b1d76
font_02_sfnt_off00011e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1