Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd0be11da60cc5a…

MALICIOUS

PDF

67.8 KB Created: 2021-09-08 15:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 63c76bf6eaf2c9c1db8c3712b81c888a SHA-1: ba5d7022d7598a3c5661f8c9fdf1b9d7b7fc9cf7 SHA-256: 0fd0be11da60cc5ae24b154c3bba1d792061114fc4653c189cda6be45230b706
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to trick users into clicking an embedded link. The heuristics indicate that the document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing campaign. No scripts were extracted, but the presence of numerous external links and the ML classifier's high confidence score support the phishing attack pattern.

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://lifebeachvilla.com/uploads/image/files/51411162009.pdf In PDF document text
    • https://karinbentum.nl/uploads/file/34009294198.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/xogivupikajijelomavimolin.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/10832712389.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/mabajejaze.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/85281098583.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/71302119536.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/49171370464.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613659a914553---kojebuwejewagelamitojava.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/15542413072.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/68109693573.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613878c60ed27---rujazu.pdfIn PDF document text
    • https://wineart.online/userfiles/file/73993763307.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/tetazuvatoraxuginik.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132661e14dbf---kojiponijaxilipevejoteze.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/povofefasikok.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/69559312582.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612efe0ade9e6---tojorevamadisodujigiw.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/sirofenogufexivesob.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/887bfdb9d9f1f93b5cecc3bc05099029/wereludigazikakiwogarewa.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/ee5fcb4e246e04023b756f4fd62940f0/zizekuvopipiv.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/nusamidelupokimominifa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=aqualung+titan+lx+regulator+service+manualPDF 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://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_off0000b132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB132 10968 bytes
SHA-256: a453c163b457cddf9c809003b6982bc3290b9c9ea14e7e89637702ac1bde67ef
font_01_sfnt_off0000ca6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27D 13996 bytes
SHA-256: 1df37276e73e59b64206665f119adb661e62bd8cd1e50b5f5a42c235cc4e18b0

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