Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef95ada001159ca…

MALICIOUS

PDF

84.7 KB Created: 2021-06-29 07:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9fc56259c9a627919b60fae73a09349a SHA-1: a2f5f3d3ff17f3c73f0ade0a42d76b934c6135f4 SHA-256: 5ef95ada001159ca4b99c2224f262851654c0a0ea2835a2f495cf26ec593726f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm directing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to lure users to malicious content. The presence of multiple external URIs and a link farm indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://accronline.com/userfiles/file/zeluresokelirisifemu.pdf In PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075a95450826---wikofegowojatatasuzi.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/2da0c1de52089d49bb64faaecd5e074a/vabif.pdfIn PDF document text
    • http://sns.hu/_user/file/jazakutadofusu.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c99e04ca22b---nonekov.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/add0dfc27cf65423a9f3c59e68ac6fca/regul.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/wawokixewusowirobejuvo.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/f478ff65ad7c67928025c5416741479a/tuxuzos.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/kibaragajugegifowigatute.pdfIn PDF document text
    • http://www.moyekolodin.com/files/xamitabatubofulaza.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/29998509813.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e1c263ef8---5657940651.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/02ba6db8e12605a7c812d3f06ced1cf1/66001197411.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/3t5drabpns9vpndpcfmukvmah1/figewuxudotaze.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/2597cdbe8d18ad60c4e0c6b5b0306967/65455544670.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/3k3u281nbk8bdcftl7mhvse350/74381821349.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/45534506618.pdfIn PDF document text
    • https://nicosiacaffe.it/file/nimowufamikebibirizoxod.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/aa1daa5c62561572963c49230c47a8a9/tuwapizi.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/60327974138.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/figuxolufokus.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7ed833e8c---voxazimenujebizejonuzax.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4625818b53---fojofi.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d352d49f499---gegozekunopuboruloxiti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=download+preset+lightroom+dng+androidPDF 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_off0000e68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68F 10928 bytes
SHA-256: 735091d9de5e4cbd254dea08b9e49b8efb6e92aa58f909ef4a3cc3f15dbaa85b
font_01_sfnt_off0000ff7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7D 17540 bytes
SHA-256: d5f81eb2cc7ffc8f7c66485dcac941f364ca378ab8b8b429d144e8fcb25992a4
font_02_sfnt_off00012d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.