Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e6a882878dd2d7…

MALICIOUS

PDF

76.0 KB Created: 2021-10-13 03:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 72418736800cbdf63ea4e2b34e3a8f97 SHA-1: 24376b8d1fb320525f025df3083988b9e4660dda SHA-256: 95e6a882878dd2d795d5366603514ddc3d3abbfe0d58bc396d19dd8fabf3b98e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism. The presence of many external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://endeligmandag.no/e-brev/data/div/58273417310.pdf In PDF document text
    • http://discus-rus.ru/upl/file/55105826461.pdfIn PDF document text
    • https://bunianco.com/other_files/File/tunupaxovuju.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/59806472224.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/mikagetusili.pdfIn PDF document text
    • http://innobiztour.com/FileData/ckfinder/files/20210925_EEC264A1673CCAA2.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/donilofawutadug.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/85354930597.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/nejatopijofu.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/vugegodab.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20219281946561410.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/powiledivujugipajif.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f0c4ea49e1---zawanekokokaw.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/xirelonifikomelazi.pdfIn PDF document text
    • https://petala.gr/userfiles/file/sowezolanegox.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/41340502634.pdfIn PDF document text
    • https://amgab.se/wp-content/plugins/formcraft/file-upload/server/content/files/16165a8bd2fb29---puwomofibo.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202198_13513_500.pdfIn PDF document text
    • http://benly-carson.com/product/files/21390719847.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/55339304112.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/TxADE9PCSUw/uplcv?utm_term=cuts+for+muttsPDF 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_off0000c5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B4 18244 bytes
SHA-256: 43aa3e3f4bc2632a21b2e3e80a9b3027526d1a310f96f49f37cd38dd04128f03
font_01_sfnt_off0000f455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF455 9972 bytes
SHA-256: d2f56d28ee955bf15ef37b560504772809684dd398da51a1a25241bde27ebf71
font_02_sfnt_off00010a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.