Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cf0d8757066ca5…

MALICIOUS

PDF

80.7 KB Created: 2021-06-28 00:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c001878ef16155ff372f46177a6a7b4c SHA-1: 9fabda858e32b8d3628cbb404ccc7bfd2dcad0a7 SHA-256: e5cf0d8757066ca5bb3aa8f4dbf22d62baec205fbda24bdc036a668ce7c91fb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, hosting numerous URLs that point to compromised WordPress sites. These links are likely designed to redirect unsuspecting users to malicious content, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc93bd5eae---xuvelomifewop.pdf In PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/47131189778.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b82340ac69f---gadilotofutuw.pdfIn PDF document text
    • http://fedoro.ru/upload/file/99980879891.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/14260570483.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/7b37a9umu62609j21ammcte7bo/36193359885.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160968f1ad0c38---mugozazedepulojeb.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/66966360237.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608853e48a320---69975186494.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c603e963ade---59247259171.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/danezokexumaradijima.pdfIn PDF document text
    • http://amandamaitland.com/images/file/nodazo.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/75182437355.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/9d7c8c354ab0898375bdf68febe981dc/museri.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/7gdgffv836q5it5eenk4a845ao/tubewu.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/56545269688.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/linukaxoroniniwojazito.pdfIn PDF document text
    • http://cuatudongsaigon.vn/uploads/files/feferolilagavefetufu.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/4418690590.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63d4c3847f---97949577797.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/46382147358.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a24c352964b---veveba.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ahnlkhqj1cus2d8qtmuln3ubq5/69944922833.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/msb673bo6bj6ubveenhf4sf784/kewimasir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=java+50+interview+questionsPDF 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_off0000d742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 10700 bytes
SHA-256: 2c32c7170fb47cea63fd7bd0555570a9259a3478ee050e1b88a6e79c75fae4f8
font_01_sfnt_off0000f016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10828 17444 bytes
SHA-256: 07bd97deb1736cd62103724b44fd28fa2d74a2d83216adf0bb8e3a7dc2b9ba5c