Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e00c05cfb18367…

MALICIOUS

PDF

86.2 KB Created: 2021-08-02 12:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 12e72e4630a0376250aca62d23e05fc1 SHA-1: 4c1483e9652a5df575059d8cc8ca637b2faefa77 SHA-256: 72e00c05cfb18367632695dd95d09382c54a4364fad1eeb55099626b555ac524
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as a distribution mechanism for phishing or malware, leveraging the PDF as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://pixomot.ru/uplcv?utm_term=stanlib+balanced+cautious+fund+fact+sheet+2020 PDF link annotation
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c65f0d2a69---39461984722.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/86141002563.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840ef3b8271---61172471036.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/c5b35d616c6451f947097b33c2fc80fb/16250305107.pdfIn PDF document text
    • https://lordoptika.hu/files/files/63990690198.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d90ed971b6---31552855287.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/4b66a93a9b0b364986a11b68a0b8efde/22440853963.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/34870115395.pdfIn PDF document text
    • http://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/boluxitefajugorilen.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/8938092641.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/siluwusuwagatumuges.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/q3vidnnqbunqa3e7pjtje5kna7/9067348769.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/25468942402.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77e146efe4---kazidatox.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/26439689840.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/51534419576.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/sazoselik.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/6j8617u4s3vaj16gd1fkm8g0l7/92090637020.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/53775097178.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/pedexusewalupumajaweligu.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/zopunabejafatopepasu.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b64a4e513ac---kasiposuwivupuludutiwunar.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083513f78264---wevovomudusidude.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_off0000eb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8F 17628 bytes
SHA-256: 12987602ecdee0524c197d32a2cd322a0e9cfa274870a6a356e16c2bdde1bdae
font_01_sfnt_off0001198d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A4 11028 bytes
SHA-256: a92d556df5b5ee86ee2b3f0fe72756b59f9b1379d4898c4c52e22ca37eb7603f

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