Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bfea29b608dfbb9…

MALICIOUS

PDF

74.0 KB Created: 2021-06-12 14:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4f46299aea46932c3a003c76ed855ea7 SHA-1: 036e9bf1ab2e8f26d676c93944d2257191126d78 SHA-256: 7bfea29b608dfbb9587a7a72d89be6e1932d8a338374e87b8e24a9d442fdafc6
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 0.9998

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://oniceh.ru/uplcv?utm_term=half+the+world+away+by+aurora PDF link annotation
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/7ghfuvk9kgf9u2ht2umlabk775/pulefofinozi.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/35928593167.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/737274170bd177288eb611ad68028037/30665890685.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/gs6jf2tses76779ag3iirpfqla/girujegidatipofasarobox.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf353772e1---narizelimirilirufip.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/59857769392.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607584928c185---32730847506.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/a84f62b98d2cfd14a81d64a23e08e10d/gaxepevefitewotivapu.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/59d8qeqcgslm2jufkb2kjttmnn/34895187179.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c5deaa01b---81778320280.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5a697fb1c---96699086085.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/vexisununuk.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a6d3c7a05---817659198.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/8a24c8b6cd94057753f65c6d91c5ebda/kikegaparewiv.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607616cea8c03---fonewiwigoziponubir.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/b824ded77daee0ced4593ee5453b9d2d/85878787069.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cb44d622f---gafulufoliromapizuzeve.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/89337203732.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 5112 bytes
SHA-256: 0fa97e2fc26685bf90dbcb0ea5fb7d67283fff00d9ff0d09016dcccd5365216c
font_01_sfnt_off0000f196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 14468 bytes
SHA-256: c6fde0c665a903569ae4a4c7fff95aba3779e0e6f4ee5b1cdf7b80101eb2ae8a