Malicious PDF — malware analysis report

Static analysis result for SHA-256 02be1f1dc46f4c38…

MALICIOUS

PDF

85.1 KB Created: 2021-09-10 22:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 48a26ce254fda6f359b7569833d59304 SHA-1: ae1553448aa4c0a5c248553480045181bc6a5337 SHA-256: 02be1f1dc46f4c387b6116196a3cc419fc1d6c7168d519fc059fe8bfcac1658c
232 Risk Score

Malware Insights

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

This PDF file exhibits malicious behavior by impersonating a cloud document lure and providing a link farm to various websites, likely to trick users into downloading a payload. The embedded JavaScript stream and ClamAV detection further indicate malicious intent, potentially for executing further stages of an attack. The document also contains a lure for password-protected archives, suggesting an attempt to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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.
  • 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 https://drafthe.ru/uplcv?utm_term=download+video+from+google+drive+to+android PDF link annotation
    • http://www.poliklinika-hb.cz/userfiles/file/varibagawerefusarufawefa.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/wuwonivob.pdfIn PDF document text
    • https://vas-vill.hu/userfiles/file/76036855148.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63802665041.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/gg3r29id954jk0sistjd1634a6/25054646586.pdfIn PDF document text
    • https://sealskinz.ru/files/file/jufolomej.pdfIn PDF document text
    • http://a-b-i-s.net/layout/bilder/file/videnekujamorip.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/60349312185.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/54310955373.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/95904116403.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161378960411fa---rojeselumuradumo.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/69236468850.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/xilubib.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/sipudevaxe.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/mupebadozotodezomapujom.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/riletate.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d57d9090d0f1b3e9b85b0db12141462c/43238444247.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/sejikukonavurixujoref.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16133752b2c1d9---rimudepuwugadujifazipux.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/sogud.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613a93b0b64f4---bisupusek.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/dedadodogotos.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/63419400928.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021091012523073499.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/34422100232.pdfIn PDF document text
    • 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_off0000e811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE811 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10028 10680 bytes
SHA-256: 0f1d00ba8f9abcdeb8036f85da136b304d6329651d6eb6d66d6a5c8c92ca988c
font_02_sfnt_off0001186a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186A 17516 bytes
SHA-256: 7e5ccd2914fd4e20bdf8a9e802f2d40263f090ed05c34b4d2242cd26ef94398d

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