Malicious PDF — malware analysis report

Static analysis result for SHA-256 e667be3d57a37e92…

MALICIOUS

PDF

79.2 KB Created: 2021-09-15 12:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0d71c079544d08b99420049e24ee5175 SHA-1: c01084e39b39ce09237ffb5de3ddd77c64ddab80 SHA-256: e667be3d57a37e9275e718ade76dc7eeee6588c9705626ed7d6aaa3f0bb13ec0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially harmful content, possibly for SEO abuse or to host further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 4

  • 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://malbreil.com/userfiles/file/rimebiwewer.pdf In PDF document text
    • https://nepalonetours.com/userfiles/files/79210064085.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/zuxaluxavuse.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/gifupekurovitasolixu.pdfIn PDF document text
    • http://briztravel.com/upload/files/66757766428.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/wegivinefevovagiw.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/figosusufitisexegiboxix.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/57102829034.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/7688094497.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/ligijixubutazokadibov.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/tibakamubobu.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/29280976248.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202109file/2021091515382470554.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc587cef89---jejakagatiruku.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/bodumekuzidaramuwiv.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/kosolujiduxenibudigaj.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/kilomutab.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/95785680583.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/gabulajegetumikujotibabup.pdfIn PDF document text
    • https://rieker-consulting.eu/files/file/makopuzedipukinazekoz.pdfIn PDF document text
    • https://beautydent.hu/editor_up/39292337130.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/33304738633.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=go+keyboard+litePDF 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_off0000c5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B7 10356 bytes
SHA-256: 31dcb890e28fc936be3b072d01734d343d1da42ab25571039b3070eb9f79cd47
font_01_sfnt_off0000dd3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF551 22524 bytes
SHA-256: 4ea8fdf1e88bb4974130598801204d8fbd7ad7dc44bd4085cdd70eb0eac11593

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