Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedae7f1e6715371…

MALICIOUS

PDF

79.3 KB Created: 2021-09-16 16:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a93efacd06ac8a5507601e9026734303 SHA-1: 0804af9c2288372e6fb28e6f673876d0ebec0809 SHA-256: aedae7f1e6715371690aa80ee585ff220fb704544548633a6508fb808425e16e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates the purpose is to manipulate search engine results or distribute further content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://misosmile.com/upload/editor/files/budubexerunupikosidibeka.pdf In PDF document text
    • http://caycanh.vn/images/fck/file/voninuwose.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/wibifejoduretatugix.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/bogizisizuja.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/24593065689.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/juxinabozerizereja.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/vuruduzuwikunutuwanekuvad.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/73387632107.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400d7d5e7f2---76415455965.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/93129684437.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/76c5f29f1b1b08fe5f2f130762d7af05/81985578590.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/pugarolerumulevesosa.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/zopamukej.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/82595814362.pdfIn PDF document text
    • https://hklh.vip/data/attachment/file/59050378445.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/gajida.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/81963667534.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/depowinorisefunojezokazo.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021091418220573499.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/79870846621.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=clash+crush+hack+apkPDF 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_off0000d2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A9 17936 bytes
SHA-256: cb237efd404cda006b4e63134a0adb56dd7b05b5d48a2efc1779793c1c52eb0e
font_01_sfnt_off000101ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AC 10148 bytes
SHA-256: eff9b2025a472880ab72c01dff1de74c1119934228f9d89d837c755d36f7599f
font_02_sfnt_off00011887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11887 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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