Malicious PDF — malware analysis report

Static analysis result for SHA-256 429ed8295d9eace1…

MALICIOUS

PDF

69.9 KB Created: 2021-09-10 13:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 048e3c7f8fdc08b122177471d183651e SHA-1: 09f749c391b83f9cfffc0da1a3d2d89e6dc8365f SHA-256: 429ed8295d9eace11483d9640dccd178539fb7df7d746a213902126499a35869
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, suggesting it functions as a link farm or phishing lure. The PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://infrive.ru/uplcv?utm_term=wireless+debugging+flutter PDF link annotation
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/jojepitimorelajinigeduno.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/48327122418.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40551873760.pdfIn PDF document text
    • http://primeasset.hu/fileok/file/xexuretek.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/webisiniwuwigogelom.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/loruratonoxolaxegezip.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/72414849894.pdfIn PDF document text
    • http://ranchobg.com/img/file/1487528240.pdfIn PDF document text
    • http://abwessex.com/uploads/files/99071691971.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/jikiweruwamabesofaxij.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/75541028314.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/14390409227.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345b7eda60b---14467610082.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/25442143919.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/xofagovete.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/jopenafutusafaxozuxagud.pdfIn PDF document text
    • http://ccsl.asia/files/pezebanezokek.pdfIn PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1630475425.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/55406246603.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/8g6qpol1vj9pkefbb0ls0tclm4/24052883758.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/61530280278.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/55574018152.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/87328826395.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/ranipug.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_off0000b178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB178 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98A 15996 bytes
SHA-256: f83483a2c7b1549f217dae6ec51e64d7e7f29cf3d198657022ba5c0b701537d5
font_02_sfnt_off0000f27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 10480 bytes
SHA-256: 6ea0d026da6e870ee5e63e09345a978348a74694bec8c4bb7461f9323296c8fa