Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0eb4dcee06e445a…

MALICIOUS

PDF

68.9 KB Created: 2021-09-27 17:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a58e3f56dc0f3e1b24e93b8078d0c99f SHA-1: 06f2c323317c7e7e147b585c4b14c87794a4ce06 SHA-256: b0eb4dcee06e445a1b1ea26d2a1edc79ea4f2296aa296ad5427018d24a894a90
154 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and is identified as an image-only document designed to lure users into clicking a link. The heuristic 'PDF_IMAGE_LURE' indicates a typical phishing shape where a screenshot hides a clickable button. The document redirects to external URLs hosted on disposable infrastructure, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://garglob.ru/uplcv?utm_term=glitch+video+effect+pro+apk+free+download PDF link annotation
    • https://mk-promotions.com/ckfinder/userfiles/files/fagumex.pdfIn PDF document text
    • http://taxfreepoint.com/file/25212673960.pdfIn PDF document text
    • http://mama-care.com/UserFiles/file/venilosipemunen.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/kozowojad.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/42437861827.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/29264671477.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/rubozu.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/xeginowox.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/vesebafuleze.pdfIn PDF document text
    • http://teedinmaesai.com/user_img/file/gijugovavewu.pdfIn PDF document text
    • http://ux-school.ru/files/files/94481544316.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78364311873.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/remosomeguzumo.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/bapodezipipoxebewir.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/73989655989.pdfIn PDF document text
    • https://expomediainc.com/upload/file/17391359414.pdfIn PDF document text
    • http://bamila.vn/luutru/files/28032913230.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1614118dc96a60---kajejamitapom.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/22894258995.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/78930744778.pdfIn PDF document text
    • http://nhuahoanglong.com/luutru/files/93360365634.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/movexasabegefigelafik.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_off0000aedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDC 10832 bytes
SHA-256: 890b40fa229c374134e12d1565927f552756e2ec3419b5ba808d64666120d755
font_01_sfnt_off0000c7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dfef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEF 14300 bytes
SHA-256: f478674e59972cb7a1defbf6a87c21064bf59c19a46bf988e1428ac7787b5ab7