Malicious PDF — malware analysis report

Static analysis result for SHA-256 89eaa2683cc158ee…

MALICIOUS

PDF

72.1 KB Created: 2021-09-29 01:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bd8b27fa359d0db365fb648e60a521aa SHA-1: 71601aba042f9144994c2196e0d0d68e9021df19 SHA-256: 89eaa2683cc158ee0049f6806366d5c2e0ef8471e1aaeaebdba89af7c1aceb8b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a common phishing lure, likely attempting to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=best+shaders+for+minecraft+pocket+edition PDF link annotation
    • http://abwplazaview.com/uploads/files/xogizevamalipebikege.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/batusuxona.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/43611473483.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/10615908838.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/39218474804.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/powisilepomu.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/10987224310.pdfIn PDF document text
    • http://wedding-ideas.ru/ckfinder/userfiles/files/xonaridepelafetefupeso.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/24325525690.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68410582916.pdfIn PDF document text
    • http://balashixa.inhome360.ru/admin/ckfinder/userfiles/files/54560577951.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/24691770998.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/sudoj.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/buzodov.pdfIn PDF document text
    • http://hasyo.net/files/file/66347179671.pdfIn PDF document text
    • https://gregoryshow.ru/files/file/viwejowon.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210924_8B2A27F185177C47.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/munomudukijowu.pdfIn PDF document text
    • https://quasar.mago.ro/ckfinder/userfiles/files/4496808839.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/46208203595.pdfIn PDF document text
    • http://inggeo.eu/userfiles/files/gedinutuwesosekid.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/romuzawif.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/winelugokisefifun.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/kumejowutumetosot.pdfIn PDF document text
    • http://hbtsap.com/Upfiles/news/file///56320554837.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_off0000b4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A3 10984 bytes
SHA-256: 40c71a2403a863ba0c5d96345e3641e1686e81792ef35210a16aca1c92ce4730
font_01_sfnt_off0000cdfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFD 17280 bytes
SHA-256: d66c736d531ffb195d291fc55b58edbdc61dfaee5d2f74ac3e1b1d4ed6118df6
font_02_sfnt_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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