Malicious PDF — malware analysis report

Static analysis result for SHA-256 c865a341887422c1…

MALICIOUS

PDF

86.4 KB Created: 2021-03-20 00:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d70cde504c78b14b7c53c42a3dc6d693 SHA-1: 4daad4cefa078c78ea726cef8e01645d6ebfee07 SHA-256: c865a341887422c134653a92c62ee40af146d79a8d70c1d42174638ab17f2e43
184 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'Pencil art ideas for beginners'. The presence of malicious redirector links and the overall structure suggest an attempt to phish users or deliver further malware. No scripts were extracted from this sample.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=pencil+art+ideas+for+beginners In PDF document text
    • http://mritzoliver.design/72147560715h4237.pdfIn PDF document text
    • http://7lessons.fun/recharge_ncell_nepal_online6r2o5.pdfIn PDF document text
    • http://sportita.fun/livre_sur_l_apiculturellgbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_873ecb4474e04af0902ec3f0aceb10bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ca15ef-77f7-4d5e-8f3c-715c79e4194a/merozekepokepuzokog.pdfIn PDF document text
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_5c63b555848649c88be6d37eca0954a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxegeza/4609231244.pdfIn PDF document text
    • https://b81f28a7-a6cc-4df9-aebb-a76b708ee4b5.filesusr.com/ugd/df05b2_08f8991b5403415a820f413a03495628.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/amaravati_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd62a96-c0cc-4bb2-9de1-c31db5be1306/pofejex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d158113-e728-46df-baa9-cce7b26560fd/mubewoxiveniti.pdfIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_5d270f56cdf44de496bb979402cb2c94.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3298529-2cba-4773-977f-5a62dddd8737/cloud_computing_architecture_jobs.pdfIn PDF document text
    • https://6db1e9a2-4282-4636-8d41-de07325ad911.filesusr.com/ugd/d97b38_21e8d95e4c7b4b2b9725ea930d711f8d.pdf?index=trueIn 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_off00011175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11175 5328 bytes
SHA-256: edff280514acb5460b71564b4bcff8f4c16a9a4ed03608e9e4f214e5ca99c6f2
font_01_sfnt_off000123a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A3 11644 bytes
SHA-256: dd178b4493e2bd505b94d6f3e845733c0a8b416356e85c1598c01baf6a546cfd

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