Malicious PDF — malware analysis report

Static analysis result for SHA-256 94089b0aafe1ed12…

MALICIOUS

PDF

88.9 KB Created: 2021-10-21 02:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5547ebe4ef054f3362c77cc593f57f8e SHA-1: f2588180cbe7a5f91792885d27f7b773b51a26ad SHA-256: 94089b0aafe1ed1265e465eaa9c89ca8f3143684e1841f661641bae74ef6de4d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm, indicating a potential phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://accuratesearch.com/userfiles/file/tevave.pdf In PDF document text
    • https://schmitz.cz/res/file/3494317270.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/38473922215.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1615ddbcc28b9c---97777553948.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/19453995661.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/jowobadabuzexezowiri.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/76185895111.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/26768871284.pdfIn PDF document text
    • https://geloracinta.com/contents/files/52004335873.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/37973964259.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nikutelilumewixuwuk.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/75660666422.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/16348020298.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/pusajawowegufu.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/biwekovobetewerasigozel.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/xafejejowosunabugazok.pdfIn PDF document text
    • http://marjoleintje.nl/include/userfiles/88796780488.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/wazenevebajikogez.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/viluzorezubuzovosexex.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/nuvafozileviwisa.pdfIn PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/58362684663.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/38948281175.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/71944287578.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/77523479697.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/rugezemuvamix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/5bhJmFgkeCE/uplcv?utm_term=witchcraft+and+sexPDF 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_off0000f589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 10500 bytes
SHA-256: 15b01e278941aa1ebef05c64d262b0a306ddb8939cf20732a7f83ca74a92bdbf
font_01_sfnt_off00010d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D69 18424 bytes
SHA-256: b4b7d6f4494f31fb7c2d0b8d8ad2ce54eb3316bdbb14c22bb8ea4c2a09aea495
font_02_sfnt_off00013d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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