Malicious PDF — malware analysis report

Static analysis result for SHA-256 993718de1881978a…

MALICIOUS

PDF

73.3 KB Created: 2021-03-12 05:35:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2b2415978fb50f723af01445c319e08e SHA-1: ac8a505b550ba800a4ae863550413ab719e30981 SHA-256: 993718de1881978a5ae4b8e30e1800f756ea7929d2a09ef050055a2fd8fa76b1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The presence of embedded URLs and the PDF structure point towards a phishing or malware distribution lure, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=accounting+for+general+management+pdf PDF link annotation
    • http://vitofemegawe.getenjoyment.net/funisek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485310/normal_603d4f18d026d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407085/normal_603946be8e1bd.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/ZibgfQt/watch_tool_kit_walmart.pdfIn PDF document text
    • http://kivedunorujuw.66ghz.com/aft_fathom_software_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409405/normal_60020d314b595.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/cgiho1a/raligeg.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/samiwofibizujapurezoduk.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/pBihhje/e-_plus_top_up_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459463/normal_5fcac92d38d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420765/normal_603f53c96b3c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_604a432692318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_602d890ea4236.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369525/normal_5fc9275b065dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480412/normal_5fdb94a1115b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xomutojekes.myartsonline.com/meade_497_autostar_computer_controller_manual.pdfIn PDF document text
    • http://nepafel.epizy.com/fabafuxeruv.pdfIn PDF document text
    • http://raxexirep.epizy.com/what_are_some_landforms_in_australia.pdfIn PDF document text
    • http://penabak.epizy.com/kemuzavirex.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 5284 bytes
SHA-256: 4a45d5ba1596f1c04ca8bf3155432f622bb204450c930f1701654ad38949d2a4
font_01_sfnt_off0000f717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF717 9692 bytes
SHA-256: 1d1402801ea4588a3e3dc22c8ceb299911cdeb961379fd5bed62624d9192e67e

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