Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e9a051275b91a1…

MALICIOUS

PDF

84.0 KB Created: 2021-09-12 03:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 72f801794f11e968e8b2a06cebbfeea9 SHA-1: 255cbd32804a84c1fdef832b9fb643df7a794523 SHA-256: 14e9a051275b91a1fe4af965817c7935b6b6e682f0a00095cd6cb80c45ba196c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs, many of which point to disposable domains and are structured as a link farm, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript further supports malicious intent, likely to facilitate the download or execution of a secondary payload. The ClamAV detection and ML classifier strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://doremimarlikinsaat.com/userfiles/file/44634415450.pdf In PDF document text
    • https://vsetinrally.cz/userfiles/file/96130935922.pdfIn PDF document text
    • http://fbrasil.com/userfiles/file///sanupumozu.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/vukadafuk.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/22881155448.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/32964711753.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/97521584953.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/gemumofiviketuzebuwane.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/sebumokunu.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/gotokelinizeraketejivabu.pdfIn PDF document text
    • https://aahs.givingplan.net/sites/default/files/editor/file/51523807766.pdfIn PDF document text
    • http://precisao.org/files/files/lodobajiru.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/jejolezubonemalilip.pdfIn PDF document text
    • http://pnalog.ru/images/file/zojutel.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/wimudonigafimip.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/71354738464.pdfIn PDF document text
    • http://micruts.org/userfiles/file/somiseximutubilejera.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/zadonarikulebopetomodan.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/satubidoruwewipudo.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecd662c928---wipenu.pdfIn PDF document text
    • https://andana.us/files/files/bofipadonekojik.pdfIn PDF document text
    • http://philipsphotographystudio.com/16244208686.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/22176349912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=create+apk+from+react+nativePDF 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_off0000e04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04D 10616 bytes
SHA-256: 2ed44e6e8bef83ac59ad64f863ee93b94950f1f8b5d4f119d2a04c7558f6d0fd
font_01_sfnt_off0000f89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AD 19024 bytes
SHA-256: 9475b2d0578f58cd6b4852dc3c6d74928609495d9a3f47bf8f6e89f2cb5f4f9e