Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbe6d9516699d7b…

MALICIOUS

PDF

71.3 KB Created: 2021-09-21 11:19:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: fbc74e8f167b5de3db292a300dd31fa3 SHA-1: f0f52015db8924f447ca39d1462b90cfe788c895 SHA-256: abbe6d9516699d7b12ed089b943d58c291ce09f401eea6a6ad52aa0bb12c66b6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are flagged as part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to malicious sites or executing further malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.
  • 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://pre-www.bridge-academy.com/uploaded/ckeditor/files/96995968731.pdf In PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/29898807691.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/95522083153.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/bezelof.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/16753892406.pdfIn PDF document text
    • http://zaiger.ru/img/file/59064344743.pdfIn PDF document text
    • http://dytac.hk/userfiles/47103376242.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210907091554.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/15016061075.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/89344410090.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/luvigofilosoj.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/9142354cb3483cf01d16e9c6927f3f98/64188922610.pdfIn PDF document text
    • http://lilipoupoli-drama.gr/lilipoupoli/js/ckfinder/userfiles/files/748295035.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/wobuliletopixuniwazifafew.pdfIn PDF document text
    • http://air-con.ru/upload/files/bemisax.pdfIn PDF document text
    • http://greenvisioninternational.gm/userfiles/file/86316213365.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/nudixutumugaguzibawasazaz.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/damutaditazewijuxebiwa.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/77299643476.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/nawuginizunazolemow.pdfIn PDF document text
    • https://indiansecuritisation.com/ckfinder/userfiles/files/xefugagexorurivofuvowek.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/45943696705.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/cb8b4f68cf623d34c980795e1a08b4c4/22217388140.pdfIn PDF document text
    • http://saigonradio.com/userfiles/file/66817347341.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=android+studio+barcode+scannerPDF 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_off0000b6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D7 10536 bytes
SHA-256: 65a53ce23fe586ce5b97031e6571d76cd8738e9f899c5215d776b1658b014a13
font_01_sfnt_off0000cf0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 16028 bytes
SHA-256: 0d6d48f672d98586f59b7dde874da40437ca7f8d37f110e68c7ad9dd9baeccd8