Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb96ee382dedbdb2…

MALICIOUS

PDF

82.6 KB Created: 2021-09-15 10:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d24ef258d413c66cfc4027b0a87e8da4 SHA-1: b7f86ef4dbbc1bfda3fc95d9c3c7263660a61bbe SHA-256: bb96ee382dedbdb2622c175fa254eb00ae5ac86320c3b3ce378d362396e18a4c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to disposable domains, a common tactic for phishing or distributing further malware. Heuristics indicate it's a link farm designed to obscure the final destination. ClamAV detection and ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xn--365-pn7mwb654m2qn.com/ckupload/files/pikagexodelanifolizu.pdf In PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/62699046379.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/dujotavakivurawoduburepa.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/5950367343.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/kumitorulasifikogaxo.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/68926127591.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/fividuwivegiw.pdfIn PDF document text
    • http://geosond.pl/userfiles/file/pujumebukorexeme.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/sikoxitadisunawefew.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109020055022210.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/vanozupafemapamonu.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/9939037416.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/515469309ffae19af092c8c2a31a1cae/18864457042.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/47684155011.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/48380854032.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b78c5d423---14002367353.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/notopukezefiposobozuwaxod.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210906092903_450039285.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/80693750995.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/bexesa.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/65380455376.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/gozof.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/61515704116.pdfIn PDF document text
    • http://bn-biz.com/userData/board/file/misivudelifunoxiwebos.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/92564848696.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=all+android+phones+secret+codesPDF 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_off0000dd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF550 17796 bytes
SHA-256: fe4a610b79387dabb89144c44254f0aac48b1abeb5c417c27038969f09e1ec09
font_02_sfnt_off00012374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12374 10592 bytes
SHA-256: 7455123332d2560eca5fda902ac1f605b0c68db012b29229715d8656fb234b03