Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe5e1120f8c8d81…

MALICIOUS

PDF

68.2 KB Created: 2021-09-28 16:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3d1204da96af5d2c3184fa1a80efe3b9 SHA-1: d5ee139eca098cc5ae70b02fbf66d50d562a08bd SHA-256: ebe5e1120f8c8d81329f0ee604a6415b9dfce3afce07422e5d15ac239a36de21
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to trick users into clicking an external link. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm on disposable hosting, further supporting a malicious intent. While no scripts were directly extracted, the presence of numerous unknown URLs suggests a campaign to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://carzip.biz/files/uploads/files/mofutiwasomilowa.pdf In PDF document text
    • https://cardolf.ro/files/tezuzuxes.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/1657947052614aef7a49279.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/70635003813.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/vojabudotapuwavuvureledaj.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/54603799661.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/kiner.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/60532512969.pdfIn PDF document text
    • http://woodwaysindia.com/uploads/nivexu.pdfIn PDF document text
    • http://aprt1day.ru/file/zufimaxuvivava.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/b1894c49dbb7fe328c83dca4e384941c/tulapubenedurumijaku.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/jafudomizunaruve.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/17545901872.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/3189878151.pdfIn PDF document text
    • http://medica-brno.com/files/52139023440.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/fekepafojivifabatexamo.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/23533408087.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sejuk.pdfIn PDF document text
    • http://powercleanperu.com/cms_powerclean_2015/sgi_userfiles/userfiles/files/jiwafuxafomino.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/8e4d34d22eb3449545e57afa0dd268ca/51556388408.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/8379664311.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=cast+your+phone+to+your+laptopPDF 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_off0000af25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF25 14392 bytes
SHA-256: 4a07c640f9cbab517987854e911992605930b8fdfc05d78db68d1e802f1eaff1
font_01_sfnt_off0000d32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 10500 bytes
SHA-256: b0f7e6423b1a03279081cf882dcfbfa8d6da5bf161e7d3ec4c6e4e28ab55de52