Malicious PDF — malware analysis report

Static analysis result for SHA-256 e098aefe0959d91b…

MALICIOUS

PDF

70.3 KB Created: 2021-09-04 09:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 96a7a9a3d1700ab4a4ddf70bf0e0859a SHA-1: a4f8b7393b86754e29d893660dca341841960297 SHA-256: e098aefe0959d91b557a64ab0012399ff7bc2a2d5efb5f5cd59fcc9fa111560f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs that form a link farm, with many pointing to potentially compromised CMS uploads. While no scripts were explicitly extracted, the nature of the link farm suggests it's designed to lure users to malicious content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://truonggiangcompany.com/userfiles/file/13949214131.pdf In PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/fupulazotakixati.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/pazaloma.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/7o15jr16ss2mt5mlrrpvsrv9iq/90598879198.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021061112012073499.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/401f1539765151732f85238f58d2de17/xoxutekobe.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/7b69d2b88b8cd5bdeb0fb106a4c9e6e3/vixosinajulipaxegokaluma.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/muvegojirewibixifijo.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/fc7d476fdf3448f8d11b5a489a1235f9/92162081675.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e354905b98---58363086098.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/nofabidis.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4a9e31103d---19145497400.pdfIn PDF document text
    • http://brno-skoleni.cz/ckfinder/userfiles/files/ziwefo.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/23837093288.pdfIn PDF document text
    • http://helloslow.com/data/userfiles/files/dogaguloluno.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/kfld0l0790hseealcce4etdf4v/1832054491.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/neruxek.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/wovibawosazufogepawim.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8953729122---koterapafe.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/debipotetipel.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/seregobowefizafawo.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/kexinetikigijovedevabi.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/64040415273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=factors+affecting+controlled+release+drug+delivery+system+pdfPDF 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_off0000b262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB262 15236 bytes
SHA-256: c553b39b081391e1fb866d33e46cf5fae1bb7e7e55b330f1e2e523d3548260d8
font_01_sfnt_off0000d932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD932 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 11220 bytes
SHA-256: 1344f5c20b93fd8ac3327fedfe7134c775152b82fbdff018d8289e39d0d14a05

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