Malicious PDF — malware analysis report

Static analysis result for SHA-256 975fc9f1bab5bb8e…

MALICIOUS

PDF

80.4 KB Created: 2021-09-16 09:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5b30669fe6623b07552f24e225272f6f SHA-1: 63198c6819de10ec06974616223f0e69de298cd2 SHA-256: 975fc9f1bab5bb8e24d752ed33d6da33f934bd717bdff541bcdd50aed8164c5a
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, some pointing to compromised CMS uploads and link farms. The 'SE_INVOICE_LURE' heuristic suggests a social engineering pretext. The embedded JavaScript likely facilitates the redirection or execution of further malicious content, and the URLs indicate attempts to host or link to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/govosujewenakokegov.pdf In PDF document text
    • https://el-tall.pl/pics/file/40534980130.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/91609822349.pdfIn PDF document text
    • https://5udua.com/contents/files/1367079398.pdfIn PDF document text
    • https://makenie.com/upload/files/79714173412.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/vefofajerisawug.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/16689190984.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612f95d69e149---jewixexokexarito.pdfIn PDF document text
    • https://posh.hr/files/lovexoduke.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/zarudatojoza.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/xiwifaladopepajodedoris.pdfIn PDF document text
    • http://okudshava.ru/userfiles/file/85689327151.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/68451794203.pdfIn PDF document text
    • https://austarpharma.austarchina.com/upload/files/90219167582.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/vometofebibewuxidow.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/mru7pssmrdsapdok152s9ppa7d/poxejodomelavedulavuxot.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/52934355989.pdfIn PDF document text
    • https://asiapharma.la/files/files/jilitidopusijuju.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/jowaxekuwiwi.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/56307388773.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134bcb4ac5ce---bedefugemuxana.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/vewunijosememumanaxonu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=see+private+account+postsPDF 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_off0000d89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89C 10560 bytes
SHA-256: cbd0d992084434c65394a88e8a84cfb01efff1b72acdbec7d862bccc05c2a58f
font_01_sfnt_off0000f0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EA 16720 bytes
SHA-256: 1da275ff579dde77c05c85dcbb47981e538d0e3047cc96474a0c430239025a20

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